I agree with poison. I have had 4 hand massage 3 times, my first time was the best. As I had already established a rapport with one of the girls as I had seen her 2/3 times previous. I mentioned to her this time it was my birthday so she offered a 4 hand massage half price. Good sales girl
She basically instructed the girl what to do which helped. This was in Tsuen Wan many years ago.
Second time was in Causeway Bay, I walked out after about 20 minutes as they kept answering the phone and leaving then coming back.
I would say build the relationship a little first, then go for it.