My wife wants to be picked up at a hotel bar, taken up to a room and fucked.  And she wants me to arrange it.

You’re best bet, especially if you want to vet, would be a swingers site. Try to vet a pro and you’ll probably be tagged as a time waster.

I can't speak from experience but they have been around a long time according to their press section. Good luck!

Although rare, there are providers who are couples (male and female.)  If you can find one, you might be able to just get the male.
.
I'd also check sites like fetlife.  Your local community might have some suggestions.

My wife who was a long time provider would get a request for a guy or couple and would bring me in to the fray. A few times over the years she got a request or enquiry such as yours.  She would refer me or one of several friends who were also able to accommodate such requests. I would certainly search among the ladies in Boston for leads.  Not the teens and early 20s gals but probably more the late 20s and 30s gals.

That featured the Vegas group of Cowboys 4Angels. It was a cool series. A few of the Vegas escort did "cameos" on that series.

NOT raised his rates since the 1980's.  

Try the most popular swinger site in Boston and you'll have no problem finding a free big dicked bull to happily pick up your wife at the bar and fuck her brains out silly. I speak from experience!  Dm me if you need the name of the website.

Weak attempt at a Boston accent!

I know you said you’re not looking for guys saying “I’ll do it” but I’ll do it. I even accept payment via on-her system.  

Just this morning I buried two more victims in the cellar.