Where people get shitfaced with lots of other people, do things they may or may not regret in the morning, and dance awkwardly. Also, there has to be someone named Claire there, or else it's not legit.
Person 1: THIS PARTY IS AWESOME!
Claire: Yeah. It's because I'm here.
Person 1: This party sucks my grandma's dick
Person 2: Yeah. It's because Claire couldn't make it.