So, what should I do for my 22nd birthday? I don't drink, and am geeky, and none of my friends (or I) am into sophistication. And I have costume parties a lot. That doesn't mean I can't do it again, but I'd have to think of a theme for it, and it's not like 'oh, costume party, you hardly ever get them!' Also, I live at home. And I'm in Australia, so it'll be winter. I'd have about 15 people to invite I think.