The Jam Box now has 2 locations - 1 in Addison and 1 in Frisco. Check the class name to know which studio to visit! The Jam Box has named themselves the "sexiest space in fitness". From the gorgeous flooring to the surround system and slick lighting, you'll feel like you're out on the town! Enjoy classes like Pound (weighted drumsticks), Funk The Fit (dance cardio), barre class and more.