Home / Needs / Gym Gym 24-hour gyms across the Bay. Lift at 4am, sweat through a deadline. 24HR 01. MuscleBeachSF Gym 24hr-gym · Outer Richmond 24-hour Outer Richmond gym. Access-code entry, serious lifting focus, near the beach. ⏱ Open 4a+ / overnight 4.4★ (52)