However, yesterday (29 March) 3,000 attended the online equivalent, Jamie told GSN. Usually up to 600 guys strip off for the event. SBN, which stands for ‘stark bollock naked’, holds regular Sunday afternoon parties in a club in Vauxhall, south London. While many workers are resorting to online video conference services for their regular meetings, sex club promoter Jamie HP decided to put the same tech to a more enjoyable use. A UK gay sex club has responded to coronavirus by taking its popular naked party online – and it’s proved a massive hit.