I would recommend Wenworth spa near pasar road (just beside Wenworth Hotel).
I went there for few times. Thai massage and Thai girls only. Since, they want to appear as legitimate business, you can only choose number, they dont do screening of the girls.
no. 75 is the best, imho. big boobs, dyed hair, gfe and friendly.
Damage is RM195 ( the last time I went, dunno they increase price or not), include sauna, jacuzzi, food, drinks, massage and FJ.