The best choice you will have near "the escalator" (15 min walk). There are a quite a few spas (massage parlors with shower facility in the rooms):
http://go141.com/en/type-6-regio ... A-HK-Sex-Girls.html
from my experience all are walk-in (no reservation required, unless you want to book a certain service provider) you have a good chance for at least some english communication;
price and tip range is similar
another option would be in the Sheung Wan area around the MTR but there the queality is more luck - you can find some gems but not steady.
enjoy