Many people need a few adult beverages before they're ready to go on stage and belt out a karaoke number, but that kind of liquid courage is frowned upon before a workout. With nothing more than water or a power drink in their systems, some people head to spinning, or cycling, classes ready to exercise their vocal cords as well as the rest of their bodies. Right there, attached to the bike, is a television screen featuring the words of karaoke standards.
Cardio workouts combined with karaoke aren't that much of a stretch; after all, step aerobics and spinning instructors count on upbeat music to keep their students going. To ensure that participants focus on the workout and not on winning the gym class version of "American Idol," some instructors will only open certain songs up for audience participation. In the meantime, instructors may take a turn at the mike themselves.
And if pop standards aren't your thing, keep an eye on other classes. From spinning classes set to gospel music to dance workouts that simulate a Broadway musical rehearsal, more and more types of music are making their way to the gym [source: Villarosa].