its pretty much all been covered all ready, but just to add on a bit...
Denver is only about a 40 minute bus ride away (and its a free one if ur a student), and has a few really good places:
Beta Nightclub (18+) - Ive seen David Guetta, Tiesto, AC Slater, etc. there, and its a really fun place on the weekeds
The Church (18+) - not as good as Beta, but still decent if you want to have the 'club' feel
Pearl Street is only good if you are 21. Im 20, and haven't been bummed at all that I can't go to the bars on Pearl because there's always ton's of stuff going on on The Hill; tons of house parties and real ragers every month or so.
if you value your sphincter, don't eat the angry whopper!
If you had one shot to do every opportunity you can, would you take it?