Why does the campfire scene from Blazing Saddles come to mind here?
http://www.youtube.com/watch?v=VPIP9KXdmO0
Exactly! They should have to eat the chili, then play until the find out who is the first to cut the cheese. Better yet, play until one of them can't stand it anymore First one to give up from the smell, or has to hit the bathroom is the loser.