I have some very simple reasons.
First of all, I think it's boring as HELL to be at a party where other people are drinking, and where I'm not. So there. I basially think all parties are boring until I start to get drunk
Second, it's much more fun to walk around, you can do and WILL do more crazy and fun stuff, and you get much more social (ok, I do).
I stick to beer.....I absolutely loathe liquir, and wine is pretty crap too. Champagne is great though too

and if you're quick you can always toss down a couple of welcome drinks if there are such things

but beer is much social and fun to play around with
