This New York Gym Wants You to Workout Naked Hanson Fitness is now offering nude workout sessions... FOR REAL. The studio, that hosts celebrity clients such as Naomi Campbell, Tyra Banks, and Rihanna, will offer three sessions a week: one mixed, one for men and one for women. If youâ€™re on the shy side, you can attend in nude underwear. According to Hanson Fitness, working out naked keeps you cooler, increases body awareness, and releases endorphins. Would you try 'nude fitness'?