Tie and pocket square hues range from solid Square Mile blues and yellows to intricate paisley. In the gloom of the basement bar, which is divided up by black drapes hung from the ceiling to create curtained-off play areas, the sophistication of the guests' attire ranges from baggy, charity shop pleated trousers scuffed at the knees to immaculately-pressed Kilgour two-pieces with cutaway collared shirts and lush, expansive double-Windsor knotted Hermes ties. As a club remix of Marc Almond's 'Worship Me Now' pulses in the background, a guy in suspenders is shown having sex with a second guy in a pinstripe number. However, the video screens dotted around the room tell a different story, beaming out movies from the suit porn studio Men At Play. Tonight, though, the sight of a load of mainly middle-aged men standing around and sipping bottled beer in suits makes the place look more like it's been hired out for a risk assessment conference than a fetish party. The venue we're in hosts a number of the capital's more offbeat special interest parties it's something of a last bastion of sleazy London in a part of town that's been all-but gentrified in the last few years.