You ask everyone to think of some thing they want to do today: go to the movies, sleep, eat an ice-cream etc. Then the people must go around the room and tell their plan to everyone, and each person they meet must come up with a reason, why this plan cannot be fulfilled. If you hear the same reason for the second time, the person must think of another one. The reasons should be as funny and creative as possible. And delivered in a polite way. "I'm really sorry, but today you cannot go to sleep. Your bed has been eaten by Godzilla."
