Silver spa is quite a good place to go but a bit ex compared to the rest in CP. This spa is also so called "clean spa" . I think their volcano massage must be their cash cow. Virtually all men who visit there take this package. If they remain "clean", I doubt they will be able to survive.
The girls who do volcano massage knows what they are in it for. The minimum service they have to provide is HJ after the "msaasge". My friend manage to have a FJ with a girl in the room.... raw some more.

He don't look like Andy Lau, in fact he is quite old also. Maybe he offered her a big tip?
I believe this is quite common, only that not many people talk about it.