There are the occasional promiscuous women, but that pool is extremely small. But if you're asking are these promiscuous women full blown lesbians and not just banging anything in sight? Well, I would have to say there are zero.

I don't think I've ever met or come across a lesbian who wasn't promiscuous, mistakenly dabbled in lesbianism due to being a tomboy/introvert/insecurity (usually through social influence/peer group pressure), or was abused.