Club-CMS Urdorf is a private darkroom that can be rented by the hour, the first and largest of the Club-CMS rooms in the canton of Zurich. It sits discreetly in an industrial building two minutes from the Urdorf Süd motorway exit, but inside it feels like a baroque castle: high ceilings, gold and chandeliers in the lounge and bar. Behind the other doors are two large darkrooms with extensive equipment, play rooms and a clinical-style practice room fitted with medical equipment. One floor up, overlooking the woods, is a lounge with a large oak table. All rooms are air-conditioned.

On the upper floor there is also a separate hourly room, which can be booked on its own or together with the darkroom. Rooms are rented for two people for three hours, with toys, condoms, lubricant, towels, a soft drink each, use of the bar and lounge and final cleaning included; overnight stays are by arrangement. The first booking always starts with a meeting on site, and the exact address is given on booking. Same-day bookings are by phone only. The room also hosts a regular evening for SM players, announced on the club's events page. Over 18 only; no smoking.