Whip your body into shape with this 10-class package atPhysique 57.This barre-based fitness company has an innovative workout program that combines isometric exercises and orthopedic stretches to systematically lengthen and sculpt your muscles and create a beautiful, lean body.Their processis similar to interval training, but they have taken that concept to the next level to make it even more effective. Valid at any location: Broadway at 73rd, West 57th Street or Spring Street. www.physique57.com