Gay saunas are places where gay men meet strangers to have sex. With exclusive access to one Nottingham business, this documentary enters the notorious, secretive world of the gay sauna for the very first time. We meet the people who go there for sexual pleasures – from teacher to plumbers to Tory councillors - and the staff who clean up after them…. There is thought to be a gay sauna in almost every city in the UK. But what exactly happens inside?