Within hours they'll be back at their desks. However, for now, they just want to party. In the Slug And Lettuce on Fulham Broadway, the office workers are singing along to "take me home, country road", waving their beer bottles in the air. At 11.10pm, the lights go up and the punters spill onto the pavement. A group of men serenade one of the girls, while 100 others hang around, chatting noisily, reluctant to let the evening end.