Okay, I know I'm a little early...

...but I'm already thinking about Halloween and having a costume party. The thing is, I've never gone to an adult Halloween party and have no idea what to do. This will NOT be an excuse for drunken revelry, more of an excuse to force everyone to wear costumes and bring theme foods. So when people get there, then what? What could we do to make it a fun evening? Somebody please help me! There won't be many people there, not many people will fit in our small house, maybe a dozen at the most, and that's pushing it. So, games, movies, Halloween movie Pictionary? Anybody been to a party that had something that was a huge hit? Anyway, any suggestions would be greatly appreciated.