StepMania – turn your computer into a dance machine
Remember those Japanese dance games way back at the beginning of all rhythm games? If you badly want to dance once again without going back to PlayStation, XBox, or going to video game arcades, then here's the perfect game for you - StepMania!
StepMania is a free dance game for Windows, Mac OSX and Linux. It is also free & open-source, don't have to worry about paying for it - just dance your night away.