Club City Zen is a 400 m² sauna and hammam libertin on the Quai d'Oran in Mulhouse — one of Alsace's most completely equipped libertine addresses. The club's own facilities list runs long: a sauna and a hammam, two massage rooms, around twenty private areas, two video lounges, a dedicated BDSM room, two rooms for group play, and a bar with a lounge, video projector and sound system.

It opens every day from 14:00, with the week split by audience: Mondays and Thursdays run 14:00–21:00 as 100% men's days, while the other days run mixed, stretching to 01:00 on Saturday nights. The management notes it may close earlier depending on attendance, so check before a late arrival.

The door works on the classic libertine model: women enter free, men were advertised at around €25 — €18 for under-25s with ID — when this page was written, with a €5 surcharge on Saturday evenings, all confirmed at the door.

Mulhouse sits in the three-borders corner of Alsace, and City Zen draws from across the region — browse our France guide for the country's other saunas libertins.