Chelsea Sports Centre

This well-established sports center caters mostly to locals, and houses a well-equipped gym (for which all new members need an induction course), a large dance studio, two swimming pools and a large sports hall. In the sports hall you can take part in tennis, badminton, netball and hockey; the studios offer classes in everything from ski fitness to salsa, so it's more than likely they'll be able to provide classes in your sport of interest. One of the advantages of using Chelsea Sports Center is that it's a community center, so expect cheap prices and a friendly atmosphere that many private clubs lack. However, be wary of changing opening hours due to use by large school groups; it's best to call and check what's free for use before turning up.