Not necessarily true Messa. There are a lot of BDSM clubs for "normal" people. Sometimes they are in private homes.Of course, as usual, it's reserved for rich people or people who have relationships ... We only can dream ...
I never wanted to join one because my job is "sensitive" in that I work closely with lawyers and sometimes law enforcement. But we got the invitation and went and when I saw the clientele (some of whom I had worked with) I understood all the rules and exclusivity.
I could lose my job, most members could lose more, a whole lot more.
And we couldn't afford to be members, I only found out after we joined that the person who sponsored us paid our membership fee.
And then I found out I was part of the reimbursement to her. A bit shocking but I also found it very erotic to be bartered like a toy.