if you really want to drink in college and aren't of age, go to house parties. in college towns, you can usually get into clubs if you're over 18, you just might have to pay an extra cover.
as for what to do for fun other than drinking, it's college dude. you can do just about ANYTHING. play sports, go to movies, concerts, just hang out in friends' dorm/apartment/whatever, study play video games, hell just stroll around campus and socialize. seriously, you don't need a bar for that. any open field on campus/in the town will do. check out your student union and student organizations/clubs. you'll find all KINDS of **** to do. some of it you'd never have known you wanted to. that's how i found AFL.