If you're in South East London, try to get to the Horniman Museum, to see Horst A. Friedrichs' very cool photos of Arabic musicians - one shot looks like an Arabic Keith Richards - an old wrinkled guy, wearing lots of rings, playing some kind of four-stringed instrument. The exhibition is free, and it's on until 27th Feb. The Horniman has a permanent collection of exotic musical instruments (and a knackered Encore electric guitar, for some reason).