Do you have a good pizza dough? How about a calzone-making bar?
We did this once in ABQ. I prepared dough then cut/rolled into small balls (6" diameter when rolled). Cover well with plastic wrap so they don't dry out. I also made up a basic red sauce and had mozzorella cheese, but asked guests to bring their favorite pizza topping. We ended up with artichoke hearts, sauteed mushrooms, sauteed onions, peppers, sausage, etc.
We put everything out on the counter and then folks rolled, filled, and pinched closed their own calzone. Each was identified with colored toothpicks, then popped into a preheated hot oven.
It would be even better now since folks have pizza tones.