I'm not talking about some strong nasty shit that you guys drink to impress each other, but the good stuff.
I like red wine; the dry, strong sort from places like Australia, Span and Argentinia; not the pissy water from France. You have to aqquire the taste though, so if you're asking for advice on drinks, you probably don't have it.
If you want something easy and partyish, get some vodka with soft-drink mixers, though that's pretty 16th birthdayish, not 21st (never mind that I was drinking vodka straight when I was 16). Spend the extra fiver for a decent brand of vodka though; all the mixer in the world won't do you much good if it tastes of turpentine.
Light beers are good too. Don't get big cans of lager if you and your friends don't drink it, since it can be pretty hard going. Go for something you can see through.
Cider is another option, and very cheap, but it can be acidic as hell and will give everyone heartburn.
Impersonating to be 21 so that you can bag a toy-boy here is morally wrong unless it's Peter you bag as he's soiled goods anyway.
Sorce doesn't want me; I scare her.
Something fruitier. Oh crap I just thought of something. Do any of you guys know whether or not I would be able to consume alcohol while on Zoloft?
Fruity? Vodka and fruit juice then. Make a punch, but don't keep it all in one big bowl; that's just asking for trouble at a drunken party.
I wouldn't worry too much about alcohol and zoloft unless you're going to be driving or something, and then you shouldn't be drinking anyway. Just don't drink until you puke and pass out and the most that will happen is you might get a little dizzy or nauseous or something, at which point just stop drinking and lie down for a bit.