The UnderGround is the clubhouse of the Münchner Löwen Club, Munich's fetish association, and sits in Obersendling rather than in the Glockenbachviertel. It is in the rear building, entrance on the left.
Around 400 square metres over two floors, with play areas that get rearranged to suit whatever the night's theme is, plus a locker room, showers and a well-stocked bar. Towels, gloves, condoms and lube are provided.
Nights run under a motto with a dress code to match: fetish, rubber, sportswear, naked. Entry is as a day member and you need photo ID, a paper one rather than a photo of one on your phone. The crowd skews younger than the leather scene's reputation suggests.