Editor's note: A previous edition of this story erroneously stated Kelly Sweeney's current role in Jazzercise, Inc. Paul Russell's pop hit "Lil Boo Thang" plays over the loud speakers as Dawn ...

Jazzercise franchise owner Jennifer Colaner, a certified instructor, participates in a class. Jazzercise instructor Amy Sand leads a group of women through the fitness program that incorporates ...

Before Jazzercise was the global sensation so synonymous with leotards, leg warmers and bouncy beats, it started with one class at a dance studio in Evanston. The big picture: Professionally ...