VOYCHECKIANS:
This game can be played with two or three performers and takes some set-up. It is an exercise in improvisation from pre-determined dialogue elements and also in keeping a sense of "where."
Ahead of time, audience members will write short pieces of dialogue on slips of paper that will be collected by the performers. Each performer should have 4-7 "pieces" of dialogue at the time the game starts. DON'T READ THEM YET!
As the game begins, the audience will suggest a "where" and the performers will start constructing a scene. They may use no dialogue at all EXCEPT for what's on their individual paper slips. It is important NOT to read the suggested dialogue until it is actually used in the scene to heighten the sense of "improv."
One trap to fall into with this game is to simply go on stage, construct an artificial "where," and then simply read off the dialogue, slip by slip, alternating between the performers. This can be funny, and it can work on stage, but then again, it's not really an improv challenge, is it?