I only been to one of these schools (UCSD alumni) and would encourage to ignore the social stuff. It's your Masters you will be really really busy. Plus everyone I know we was involved at school had an active social life it was the people who expect a social life to come to them that had problems. There is no Greek housing and no D1 sports team, but you have a normal adult social life. You meet friends you go out with them around town (the town is nice, but it's different then LA in both some good and bad ways). It's really not a big deal since once again you will be busy, most graduate students I talked to while there hung out in the pub or other places that sold alcohol (there are about 5 or 6 on campus) because there isn't much time to do a lot of events/partying.
One more thing, if you think the people at anyone program kind of suck then I would consider that strongly, you'll have to spend a lot of time with them so that matters, how much will depend on your personality.
So just go where you think you'd have the best academic experience (keeping money in mind) just my opinion.