Alright lads, Im from 22 from England but go to college out here near Chicago so I know a few things about the way things run out here...i hope.
-Buy a panamaniac card. If your all over 21 its well worth it. Free beer and free enterance fees to alot of places every day. Only about 25 quid. Search for it on the net.
-Go on the pub crawl. Ive not been on it myself but ive heard alot of good things.
-Taxis are $3 (1.50) per person to most places on the front, so its cheap enough if your far away. You will meet alot of people because they pick people up in your taxi too.

Im off next week, so ill leave some more info, or just check out this board.

Hope it helps

Cuzzy