Talk and Socialize With Everyone.
It's a cocktail party! So, have fun, move around, and talk to everyone – not just the host and their circle of friends as well as yours. Converse with other guests, the bartenders, and servers, make friends with other people's friends. I mean you never know where your next invite will come from, right? Also, this let's people know that you're approachable, friendly, and inviting. These types of people always have more fun at cocktail parties because everyone loves them. Not to mention, if you make new friends now, you'll have more people to party with at the after party and even more friends at the next cocktail party. But break this next rule, and you're imaginary crown will be your only friend, which brings me to my next rule.