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Having spent the last many years of my life in BDSM subcultures, I read this and wonder whether what I'm seeing here is a consensual enactment of dominance/submission.
A lot of folks play with sexism and other oppressive dynamics for erotic fun, then leave them behind when egalitarian communication is what's called for. It's a way to get the cave(wo)man turn-on of this sort of behavior, without having to live with it day in and day out.
I'm not prepared to judge this issue until I see how these women treat each other at home. I'm wondering if the club behavior is a persona, as erotically "meta" as a leatherman's chaps and studs.
This is all outside my cultural milieu so I don't know for sure about these particular women. What I *do* know is that in erotic power play, things are almost never what they seem.