For me, it's amateur part-timer every time.
In 2012, just prior to the Olympics, I got sick of cleaning my flat and rang a local cleaning firm. One hour a week, £14, to hoover / tidy etc - I'm sure you know what I mean. Anyways, the 36 yo redhead they sent round was fit as you like (not gorgeous, but tall - I like that - and a wicked smile), I started thinking "impure thoughts" there and then. She was also massively chatty; I quickly got the impression that she'd have rather chatted and drank tea than polished / dusted!! I'll call her Helen, that not being her name.
Over the following weeks / months, on the occasions I was in when she visited (I work odd hours) we got chatting about "this and that", as you do. One of her common topics was how her ex-husband was being a twat with CSA payments and she was dreading Xmas coming.
She gave short shrift to suggestions of another job, more hours with the current cleaning firm etc, and I then jokingly suggested she become a lap-dancer. "How do you get a start doing that?" she asked. My loins were going haywire as I realised she was being serious. Chancer that I am, I suggested that she try a "private session" with me to see if she enjoyed it, and if she did to go to one of the clubs in a town a couple of hours away; if not, nothing more need be said. I was half-expecting to get punched when she shrugged her shoulders and said "Alright".
The following evening Helen fronted up, took 20 mins to get changed, and did me a "dance routine" in my living room that girls in Prague clubs would be proud of. My question of "I take it this is look but not touch?" was met with "Don't be silly!". By the end of said dance routine things had progressed (!!) to the extent that we had agreed an hourly rate for all services and she was my regular till she moved away in May. Even now I get the impression that it wasn't the first time she had played this game. That said, it was far better than any experience I have had in London, Prague or The Dam.
Forgive me if the above sounds like a w*nk-fest, I don't mean it to. All I'm looking to illustrate is that the part-timers, or indeed those on the verge of part-time work who can then become persuaded, are (IMHO) a lot more fun than sauna visits or hotel in-calls.