Gyms use very rhythmic songs, some of them you also listen to in clubs. This is actually how the fitness clubbing was born, here you have a youtube promotional video for Denver Fitness Clubbing.
It's a simple but efficient idea combining two elements.
So now, what about a Karaoke Fitness Class?
Wouldn't it be cool to dance on Riri or Queen B while singing one after another (not the whole song yourself, it would be too tiring!) with the promise to have their endurance and physique at the end?
There is already Karaoke yoga and last but not least, the Zing method!
Karaoke fitness might be the next big thing, who knows?