Our experience with orchestrating meetings has been fraught with problems, and we no longer even consider "searching" for a guy. I know there are exceptions, so please, bulls reading this, don't take offense. But we did not encounter any such exceptions. The guys we met through dating sites, including places like Ashley Madison, were typically either weirded out by it, or flakes, or rude, or all of the above. They might ask a lot of questions out of curiosity, but would then disappear. Guys that would appear to be open to it would often progress very quickly or immediately to "what kind of sex do you like" type of questions. It was not uncommon for guys in this category to demand to know if there would be sex on the first meeting. Generally, the attitude was demeaning towards the wife.
One guy that she was ready to meet with for sex, without an agreement with her in advance, told her he had taken a room at a local hotel and to meet him there. A quick check of the address revealed that it was a very seedy hotel, and when she objected to such a venue, he was offended. He'd already paid for the room, and after all, they were only going to use it for sex so who cares? Yeah, um, ok. Bye! And of course he was highly pissed at that outcome.
Another guy she agreed to an initial meeting, and when he showed up, he was not the guy in his online photo. He explained that was a photo of a friend of his, and again, didn't seem to understand why this was a problem.
Others got right to, "Do you like anal?" "So, if we meet and things go well, do you promise that we'll have sex?" Good grief!
Others would meet, have a nice meeting and even some kissing, and then completely disappear. Flaking is the order of the day.
On reflection, I guess it shouldn't come as any big surprise.
What works? Organic meeting. Being flirtatious and approachable. Responding to flirtation in a friendly manner that encourages conversation, but not so overtly flirtatious as to be "too much" or to give the guy the feeling that she's just fooling around with the flirtation. Making eye contact that is sustained for just a few milliseconds longer than would be the case if she weren't really interested. Smiling. Looking back to check after he walks away, and smiling when she finds that he is doing the same. And most of all, patience. Guys will come, and the right ones will be interested and pursue her. They both know via the time-tested organic signals when there is mutual interest and attraction. YMMV