Harry's pick - The Secret Market on Commercial Road, E1 - is run by Andre John at Central Locations, which keeps publicity to a minimum and texts a location to the crowd on the night of the event. "The royals and posh people want to have a good time somewhere less pretentious without the hassle of the public and press. People on our mailing list get invited - and to get on the list, you need to know someone," said John.