I see that after being closed for 2+ years the Edge dungeon outside of SF is open again. https://www.edgedungeon.com/

It is a facility rental type operation rather than offering BDSM sessions. I've often thought how amazing it would be to spend a day or two held prisoner there under the control of the right Domme. The combination of a secure holding facility (offering various levels of severity) along with a very well equipped playspace would seem to offer some pretty intense possibilities.

Anybody ever been?