Fitness Cell Collective's disciples don't work out in a gym. Dubbed "The Compound," the Collective's roomy studio encompasses familiar fitness devices, such as kettlebells, as well as some unconventional equipment. Olympic-style rings dangle from the ceiling alongside suspension systems and ski machines, and a 40-foot-long set of monkey bars facilitates intense workouts and high-speed banana relays. With these tools, the certified trainers?who range from martial artists and professional weightlifters to dancers and triathletes?lead classes for all fitness levels. The classes?featured in New York magazine?range in scope to include kettlebell fitness, mixed martial arts, yoga, Pilates, and boot-camp training. The Compound houses more than just modern fitness equipment; postworkout, exercisers can purchase and refuel with fresh, locally made, organic snacks and signature protein drinks.