Hey Kenny,
I'm writing this to share my experience. VIP is much better than most Asian places. My visit to new VIP is that they do have 6-7 attendants, however if all of a sudden there are for instance 4 visitors that visit at the same time as you, they will have picked the 4 best looking girls and you're left with 2-3.
Also I'd suggest calling the phone number of the location directly and not the main line that takes calls for all the locations, they don't keep tabs of who is busy or not. But if you call the actual location, you'll get a more accurate idea of who's available. Keep in mind the person that picks up the phone is ESL level English. They don't speak or write like us here, so don't have your hopes so high.
Go in with low hopes and a plan B at a nearby other Spa so you can walk away, no hard feelings. Any reasonable Spa will understand that.
My final tip is to go at a time when all or most of the attendants start their shift yet, not when it's rush hour when every patron shows up after work. My experience is around 3-4pm. You'll have best selection of girls as they have their fresh makeup on and everything is tight. Further, you won't be taking second or third dibs after everyone else has already stretched them out.
Hope this helps, good luck and enjoy.