I just had an idea for a dinner party: The No Ketchup Dinner.
The idea is simple. A few days ahead, everyone notifies the group what item he'll bring. The item must be something that he consumes with ketchup, like hot dogs, fries, hamburgers, fish sticks, tater tots, home fries, omelets, meat-loaf, onion rings, chicken nuggets, etc (I thought there'd be more. What did I miss?)
Then everyone would bring condiments she likes with those items. For example, I like ranch dressing with fries, honey mustard with chicken nuggets, sauerkraut and mustard with hot dogs, or guacamole with hamburgers. And, of course, everyone shares the condiments.
For desert, we could have Ketchup Cake.