I dont drink either. It's perfectly fine if you only get a coke or something like that.
I spent some time in the industry and did fine alcohol-less during all of those business dinners, business trips, company parties, etc.
Now, I am back in the academia, I feel no peer pressure to drink alcohol during social events.
The key is that you must be comfortable with yourself (i.e., not drinking while others are). As others pointed out, you are dealing with a group of grown-ups now, they wont tease you (I think).
Just be yourself