That dance pad's an IR controller though. The Wavebird for the Nintendo Gamecube (and I assume all next gen controllers) are radio-based, which means you should be able to continue playing when you go to another room or even, conceivably, outside, provided you have enough mirrors and the wherewithal to arrange them so that you can see the screen.

IR controllers aren't fast enough for "twitch" games like fighters and FPS. I'm curious to know, however, how Sony's solved signal conflict at their level of market penetration. For Microsoft and Nintendo, it's not so much a problem, because you won't have as many people in a smallish area as there are available radio channels, but some dorms will be full of PS radio noise.