I find there's way more theme parties in college than high school to be honest, and hell, shit can be fun. You haven't lived until you've seen a girl cover herself using only belts at an "Anything But Clothes" party.
Definitely set up a beirut table. Isn't too original, but it's practically necessary. Techno stuff is always fun, just set up a strobe light, maybe a smoke machine... sounds corny, but it's fucking awesome. People aren't going to dance at first, but that's what your 'ruit table is for... liquid courage.