24 hour service in London
If you struggle to fit in work outs before and after work, The Gym Group is ideal as it’s open round the clock. There are currently over 20 branches in the capital, with even more set to open. Many of these offer video classes, which means you get the benefit of a yoga or pilates teacher even at 4am. They also claim to be cheaper than most gyms, plus most of their equipment is energy-efficient by not using electricity.