People have different strategies for unwinding. Some have a glass of wine after a long day, others get lost in a book, and some do yoga in the nude - on Tuesdays in Clapham, led by seasoned yogi Doria. The idea is to feel as free as possible without the constraints of clothing, downward dogging your (tightly clenched) nude bum into a state of nirvana. But don't go in looking to get titillating by some bare tits - the class conforms to the ideology of naturism, which advocates the health benefits of being in the nude. It's backed by science: research has shown that going au naturale can make you feel more satisfied and happier with yourself. Go on then, get nekkid. Ninety-minute class - £25.