You are having a small dinner party. Unfortunately, you're not a very good cook. You know how to make about four things, and none of them are very exciting.
You consider having a potluck, where everyone brings some food. But then you realize there are limits to this strategy, since some of your friends are probably as bad in the kitchen as you are. You know you'll never know all the things your friends are good at, but you need to focus on some party-related things.
You ask each one if they want to help with food, drinks, music or something else. You also ask that whatever they bring, to please bring something they think some people will like, but others will not like (rank depends). This way, the diversity may start some interesting conversations, but hopefully no fights!