YES!!!! DDR!!!! I believe that DDR is a better attempt (actually it wasn't even the attempt they were making) to make a workout game. You can go on DDR forums and read about people losing weight like crazy. I mean, it's so fun and addictive, and you are moving around the whole time. Forget Y!T get DDR!
P.S. It's not like they don't have a workout mode on DDR anyways...