Happy to help u Wackojacko.
If u haven't called the Hotel girls before and only speak English, be prepared for a fair amount of work. Some minders will have no English, even hang up on you, so you will get some rejection. I was after this really beautiful "gem" once so I called back a few times and thay actually put a bar on calls from my phone! (don't worry it won't stop you calling for other WGs). Sometimes it sounds like you are are onto to some form of call center as u can hear several phones being worked ..... this is good as they may be able to switch you over to a colleague who speaks English, and such person will want to work with you for repeat business, it's their living. They will likely give you their name and direct phone line: "call me, I know all the girls on 141" (BS). Use your radar as I had one guy who was a "hustler" and tried to add major mark-ups on WGs price.
This should be obvious, but I would only have WG overnight if I had a room safe to lock my stuff in, and I was staying at a reasonably secure hotel that wil screen people to ensure only real hotel guests get hotel access at night (I stay at the Sheraton in TST and never had any problems). You don't want WG to let a couple of her "gorilla" friends into your room at 3:00am while you are asleep, what a rude wake up call that would be ..... "open the safe Gweilo"
As u probably realise I prefer WGs back to my room. You can negotiate with a 141 walkup too if she is too your taste, and willing. Many work in real low rent premises and I find I can relax much more in my own room, I feel more in control, plus room, sheets, towels, etc., are all high standard and clean.
Plus if she speaks a bit of English u may want some company over dinner. I had a lovely girl once (no longer in HK) who I met in James S Lee Mansion and after great service there negotiated $3k to come back with me to hotel for dinner and fucking, from 6pm to 11pm (11pm was her advertised finish time so she either had a kid or boyfriend at home). She got quite drunk with me and I had great GFE, BBBJ, etc. About two years ago "Suki" in Fuji building (Causeway) offered to come back to my room in TST with her girlfriend (3P) for $2k. I thought this was too much HK$ so didn't take up offer but still regret my decision.