For those that don't know how these places operate:
When the house fee for the Massage is $50 for 30 minutes, the house keeps $40 of that and the girl gets $10. For an $80 hour the house keeps $60 and the girl gets $20. The house needs to pay the bills and make a profit too.
The girls get, on average, 2 to 3 jobs during a 12 hour day. If they get 3x One hour visits they made $60 for 10 hours of waiting/working. $6 an hour, and that's on a GOOD day.
The tips they make are theirs to keep and that's why they ask for them.
The girls need to make a living too. If you're happy with the massage then show it. Even if you're not happy tip them *something* to make their life less miserable.