National Big-Box Fitness Anchor. 24 Hour Fitness is one of the largest fitness chains in the U.S., offering a wide range of strength, cardio, and studio amenities. As a major Anchor Tenant, they drive significant daily traffic to power centers and malls. While they have optimized their portfolio recently, they remain a key player in the sector. They require large footprints with high ceilings and ample parking to support their high-volume membership base. Sites with good visibility and easy access are critical for their 24-hour operation.