Shoot from the Hip
Written suggestions for lines of dialogue. Check here for some of our favorites.
The audience writes famous quotes, slogans, movie lines, etc. on paper slips and put them into a cup. The actors split these lines between themselves and put them in their pockets. The host gets a suggestion for a scene and the actors start a scene. At random times, the actors pull one line out of their pocket and use it as a line of dialogue in the scene.