Today at Groupon, pay $26.99 for Zumba Fitness Core for Wii or Kinect for Xbox 360 ($39.99 List Price) + FREE Shipping + FREE Returns!  Zumba Fitness Core helps players sculpt their core during a whole-body workout customized by level of intensity. Forty original songs or hit music from Enrique Iglesias and Karmin go with the dance-based [...]