Hello fella,
A regular in the Mitre pub HP ect. I'm an amateur when it comes to this game so my advice is purely is you're desperate. Willesden Green (jubliee silver, Kensal Green (brown, bakerloo) there is a 24hrs parlour called cleopatra's, £10 in then about £30/50 for 3min blowy sex. Honestly is is a bit shit but a 24hrs constant. Had A bird fall asleep sucking my cock late last night but better than nowt, just!