I have never watched anyone interact with a pro Domme, but I have done a public scene with a stranger, and I imagine the negotiation between a client and a pro Domme at a club would be very similar. They need to go through a check list of safety concerns, not only physical but mental as well, then a checklist of what is and isn't ok. The thing that is most important for that type of negotiation I imagine is a discussion of the client's fantasy: what does s/he want to get out of the scene? What will they be satisfied with?
It's so hard to make sure these things go right, as you are playing with fire here. When it's somebody who you don't know, anything could set them off. Do they even know themselves well enough to accurately warn you of their limits? What if they become non-verbal, or freeze in fear? Then the scene could become a disturbing experience.
Also, there is often a great dissonance between what we fantasize about doing and what we are actually willing to do--knowing this fact and carefully considering your limitations is difficult, and often, you don't realize that you really AREN'T a pain slut/sissy boy/human toilet until it's too late, and you're already suffering. That's something a client needs to shut up and get over, but damn, that must be tough for a pro Domme to navigate. And emotionally exhausting.
It's easy to say "yeah, I'd be willing to make $400 an hour!" but how easy is it to emotionally and physically dominate a complete stranger without pushing the wrong buttons? Topping someone is emotionally exhausting enough, the personality change that one must affect day after day would just really be too much for me, I think.
