Our Technicolour Dream
ICA, SW1
Commemorating the 40th anniversary of the 14-Hour Technicolour Dream, a huge psychedelic happening at Alexandra Palace, some old hippies reunite to play beneath the swirling oil wheel. There'll be live sets from the Amazing World of Arthur Brown, the Pretty Things, Circulus and Mick Farren. (020 7930 3647). Sat 21 Apr, 12.30pm-1am.