Muscleworks Southwark in City of London | Facilities, hours... Muscleworks Southwark is a gym in City of London, offering gym and fitness facilities, strength and cardio training, membership enquiries. Address: 110 Southwark St, London SE1 0TAOfficial website Things to do today Things to do tomorrow This weekend Free events Family events Kids activities in London Live music in London Live sports in London Cinemas in London Gyms in London All London events