I only have a few rules when going to a party.
1. Make sure you know the host,and have a good idea of who is going to be
there.
2. Never go to a party that you can't leave. (on a boat etc.)
Oh, and if you don't assign bottles, you'll probably end up with 10-12
bottles of Bacardi Limon or Absolut Citron, and everyone will conveniently
forget to bring gin.
Good luck.