Great questions I will do my best to respond to them!
1) It's very easy to do so. Pretty much any class that you want to take as long as its course code is above a certain number can count as an elective. I'm currently take a French literature class as an elective. Though I don't really like literature all that much, I hope to work in an international organization one day and French is very useful for that. You can take classes outside of IR topics, heck outside of SFS as well. In fact, you can fulfill the core requirements, take on TWO concentrations, and STILL have a couple of electives left over.
2) It's pretty nice that the class size is small. Most people are on a friendly basis with one another, although I think in general people are very busy and are interested in pursuing friendly/professional relationships with one another and not become buddy-buddies. There are a small handful of people who started dating with each other within the program, and some people are really good friends but on the whole it's mostly just everyone does his or her own thing. There is room for drama but I doubt that's unique to Georgetown. There are also plenty of opportunities to socialize and network with other people within our own program and with folks from other programs. There are happy hours and other kinds of events.
3) I actually really like Georgetown. More than my undergrad in fact!
One thing that I particularly like is that our M.A. program isn't solely an intermediary for a Ph.D. I know for a lot of other M.A. programs in Asian Studies, the expectation is that you are using it to prepare for further study. In our program, however, while you are very well prepared to go further in your education (we just had some people get into places like Duke, UPenn, UVa etc. for Political Science - very cool!), you don't have to. Many of our graduates go on to things in foreign service, state department, public service, etc. I think most people don't plan to apply for Ph.Ds in fact, but if that is something you're interested in, you have the resources and support you need to do so! I myself am thinking about applying to Ph.Ds, with University of Washington being my first choice - it's just a matter of when I'll apply (this year, next year, the year after meh who knows!).
Another cool thing: being the top-ranked university in the nation's capital, we get a lot of really cool speakers on campus. I've been able to attend presentations by (and met one-on-one with a few of them) Nicholas Kristof, Yeonmi Park (well-known defector from North Korea), Kevin Rudd (former governor of Australia), and others. We have a lunch with an ambassador series and have had chances to meet the Taiwanese Ambassador to the U.S., the British Ambassador to North Korea, etc. There's often free food at these events too, hehehe.
The location is really convenient too for networking and meeting people in government and other high-end places. I was reading an article in the Economist Magazine the other day and it said something like "so and so person thinks this and that will happen in XYZ country" and I was like wait a minute, I got beers with him just last weekend!
In terms of professional development, the program really helps with landing internships. I landed a cool one and never would have been able to had it not been for our program.
The classes have been almost ALL great quality (with the exception of the Korean language class I took - will get to that later), instructors are friendly and helpful and knowledgeable (Dr. Green is also really funny). For one class in particular, we learned how to write policy memos. Now that was really neat and fun to do! The administrative staff are also very friendly and helpful. I'm sure you've communicated with Robert Lyons in the course of your application - he's great and we all love him!
I love the campus as well. It's really aesthetically appealing and a pleasure to walk through. Can't help but feel a little proud of being at Georgetown! I also go to the gym everyday here. There are usually plenty of activities to do on campus to. Events, speaking engagements, happy hours, etc. The weather is generally pretty pleasant and mild, at least compared to what I'm used to. I went to undergrad in Chicago, and grew up in Canada though. So mild for me might mean something different for you.
There are, of course, downsides...
Despite the good time I'm having here, and even though I really like it here, am happy here and find the program to be great quality, I still somewhat regret coming here. For one, personally I am fresh out of undergrad and I kind of wish I'd taken some time to do other things before grad school. There's definitely a little bit of burnout for me from schoolwork. This may not necessarily apply to you, but even if it does, going directly to grad school may be the right choice for you - everyone's situation is different.
Another thing is the cost. I unfortunately did not receive funding, and in light of that fact and the heavy loans I had to take out, I wish I'd thought things through more carefully because this student loan debt is immense. Not only is the program extremely costly, but the area to live in and to rent is extremely expensive. Just one month of rent for me here is probably enough to feed a family of four in my parents' city in China for a year. If you get FLAS or if you got a departmental fellowship, it might make it worth it, but for me I really wish I didn't have these loans. The area is extremely nice though, so I guess you get what you pay for.
In terms of funding, I also feel a little misled and even a little played. I distinctly remember being told that the program tries to fund more second years. Guess what, none of the second years got FLAS funding last year and it is my impression that they didn't get departmental fellowships either. Words from another student: the FLAS money and fellowships are just "bait money" to get students to enroll. Since I already sent in my deposit before they decided FLAS, they had no incentive to provide me fellowships. Since second years already have to finish if they want the degree, there's also no incentive to fund second years. I am applying for FLAS again but I know there's basically no point to doing so because I'm fairly certain they won't be giving second years funding. It makes me all the more bitter because I look at the people who did get funding, and while they certainly deserve it, I feel I am just as qualified as anyone.
I don't know what your regional interests are, but I am doing stuff related to Korea and accordingly took Korean language last semester. It was the worst foreign language class I've ever taken in my life, and I've taken many, many language classes. It was so poor that I stopped taking Korean this semester even though I love the language and the culture. And, had I known about the poor Korean language class, I would've signed up for Japanese from the start. Since I wasted a whole semester of language, and since I couldn't exactly start in the middle of the year for another language, I essentially wasted a year of potential language study and indeed, feel very bitter about this. I and several other grad students have complained to the department about the poor quality of Korean instruction. The instructor I had also came in late every singe day and one time came in half an hour late, popped her head in and smiled, then left again. The undergrads say things like "but it's an easy A!" well news flash, I'm not paying thousands of dollars for a letter on a piece of paper. Plus it's possible to have an easy A class that is simultaneously a good quality class. I'm just glad I didn't have to pay for the class myself (the program pays for language classes). I'll probably take a semester of Japanese next school year, but that means at the end of the program I will only have one semester of Japanese whereas I could've had three. The good news is that apparently Chinese and Japanese are much better, so if that's what you're into, you're fine.
Also, be careful of who you room with. I live with a couple folks from the program and unfortunately one of them is really inconsiderate and annoying, and considering I see this person every day both in the apartment and on campus, it is really unfortunate and detracts from the otherwise great experience of being here.
Notice how I said at the beginning that I regret coming here somewhat. As long as I can find a good job that I like after graduation everything will be okay because I'll be able to pay off loans. But it definitely limits the possibility of traveling for a couple years or doing volunteer work for a couple years.
I hope I have been helpful!
Feel free to contact me with any further questions and I'll do my best to answer!
