Founded by Harvard grad, Brynn Putnam, Refine Method is a boutique fitness studio offering small group classes and personal training, specializing in full-body, high-intensity interval training (HIIT)--the perfect blend of cardio, strength and flexibility in 50 minutes. Refine has been called "New York's Smartest Workout" by Fitness Magazine and "The Best of Boutique Fitness" (Marie Claire).