justdeborah, I've thought for a while that a make-your-own-pizza bar would be a fun idea for a party.  My question is how do you cook them so that people can more or less eat at the same time?

my pizzas were bigger than 6 inches….more like 10 inch round-ish crusts that I brushed with olive oil and prebaked, 2 to a baking sheet, 2 baking sheets at a time, for about 15 minutes, rotating the pans halfway through.  Then I pulled out the pans, laid them on the table onto multiple hotmats, and told everyone not to touch the pans as they dressed their pizza.  All the fixings were on the table (sauteed onions, diced red onion, sliced tomatoes, olives, hot peppers, sausage, homemade pizza sauce, cheese curds, smoked mozzarella, parmesan, diced green pepper, and pineapple tidbits.  As everyone was building their pizza, I popped my crust into the oven to prebake.  When mine was done, their's went into the oven to finish.  I dressed mine, and popped it in after theirs came out.  

So, all in all…four people ate about 5 minutes before I did.  Hope the explanation makes sense.  If you made smaller pizzas, you could feed more people at once….but I was ok with starting to eat a few minutes after the others.  

HTH