Games Spin Demo

Hello list! I'm an ambassador here in California, and I was thinking about doing a demo of the game spin Southern California Linux Expo (SCaLE 14x) We've done live demos of Music Spin the last couple of years and are wanting to change things up. I was hoping the list could suggest a few games that might be good for demos or tournaments (ie 2-4 players on a screen) Thoughts? Comments? Suggestions?