WHAT is "DDR?"
Pretty sure DDR is Dance Dance Revolution. You have a footpad, and the screen shows you what moves you are supposed to do, and your score is reflected by you actually doing it. Hard to get a top score without working up a good sweat.
Yep, Bettis has it right.
It's a game called Dance Dance Revolution.
It started out as an arcade game (I believe).
Then they customized for home use.
A pad goes on the floor with arrows on it. The screen displays music and arrows that follow the rhythm (you can pick the music and the skill level), and then you follow the arrows by placing your feet on which ever arrows are indicated on the screen.
We leave the DDR set up on a PS2 in one room. It's really popular when kids stop by, the girls seem to like it more than the boys. But we have adult guests who enjoy it too.