Kevin -
I'd love to hear how it works out. I think it helps when you make sure learners have intrapersonal time first (structures, say, 5 minutes) to figure out their own solutions, then get in a team for interpersonal (say 20 minutes) with the instructions for everyone to share. This helps reduce the likelihood of a coup.
I don't think there is anything more fun than watching a game teach a group of people without me!
Lou Russell