Meet the fastest-growing health club chain in Northeast Ohio. ONYX Health Club 24/7 operates its clubs from The World HQ which is located in Niles, Ohio. We are currently located in Mentor-on-the-Lake, Northfield, Fairview Park, North Olmsted, Wadsworth, Parma, Niles, and Avon Lake. Each club is tailored to fit the needs of the community it serves. Everything we offer is custom-designed to fit your goals, your schedule, and your budget. With a flexible model approach, we positioned to be successful in any market. Our mission is to help people achieve their greatest potential through fitness. ONYX Health Club 24/7 is redefining Fitness, Group Training & One on One Personal Training in an inclusive, community environment.