And that means that looks shouldn't enter the equation. This, of course, assumes that the customer is clean, friendly and respectful. Since most of us are older gents, usually somewhat past our prime, providers should have a clear expectation as to how we will look. Providers are paid to give us the fantasy of our choice, while customers have no such obligation. This is the hobby after all, and not eharmony. LOL
In my experience, the providers of Vegas have been very good to me, so I'm not complaining here. I've only had one bad experience in the past 5 years, about a year ago, which which might have been related to OP's question. The provider was extremely unprofessional in many ways, which prompted me to write my first negative review.
I'm reminded of an excellent LV provider whom I've seen in the past. Even though I wasn't at my best (I asked her about rescheduling, but she wouldn't hear of it), she gave me a wonderful experience. To quote her website, here is her response to the question of entertaining guys with disabilities:
"Yes, Yes, and Yes...I do not discriminate on any basis and neither should you. I have seen men in wheelchairs, walkers and the use of canes along w/ other ailments and it does not bother me a bit. I find it is the personality whom I will discover in them who are the most enjoyable."