The Ugly +1
Sometimes you don't want to roll up to these parties solo. So, in the hopes of making the night more bearable, you extend your +1 privilege to a homie you haven't seen in a minute or a girl you're trying to hook up with. Well, whether you realize it or not, you've just produced a fashion party stereotype.
Your guest won't know many industry folks there, and with the booze flowing what else is there for the bored add-on to do but start going hard. Pretty soon, the girl you brought is slurring requests at the DJ and is the only one trying to dance. Or your dude is twisted to the point where he's the lecherous guy trying to hit on all the models. Everyone in the room starts to keep at least three feet of distance. If you're the one that brought along this whack guest, you only have one option: Act like you've never met them.