The main hall at Seymour used to house one of the most attractive swimming pools in London which measured, bizarrely, 44 yards. Now a floor seems destined to cover it permanently, giving over the space to racquet sports and five-a-side football. Swimmers are still catered for in a bright but narrow 30-metre pool that's also used for sub-aqua. There's a large gym here, an extensive programme of classes, a physio practice and a beauty salon in the basement. Good value considering its location.