SIR Fitness is based in southern California and our 13 franchise locations include Garden Grove, Huntington Beach, Fountain Valley, Tustin, San Clemente, Orange, Anaheim, Vista, Oceanside, Carmel Valley, Eastlake and University Square. Our clubs are filled with the best strength and cardio equipment in the industry, including a functional training zone with turf, olympic lifting platforms, group fitness studio, and tons of machines and free weights.