Of all the remarkable things about Oscar Owide, what most astonishes is the fact that he got away with it for so long. How did an ex-convict, barred from running a business, and once dubbed "Britain's biggest pimp", hold sway over a rich tract of Soho and, in his 70s, help create a nightspot patronised by the likes of Madonna and her husband Guy Ritchie, George Michael and Chelsea Clinton?