Tell a straight person this is a place where men can have endless anonymous sex in an array of private cabins, darkrooms, glory holes and communal areas, and their fascination will know no bounds. These places are generally unique to gay men, though some saunas holds nights for lesbians. The size of the steam room is beside the point. You’re not going there to open up your pores, but to open up another part of your anatomy – or someone else’s depending on your preference. Get lucky, and you may bump into a porn star; but on a bad day you can pace the corridors for hours looking for that elusive fuck.