I have been to this place at least 8 times. I have gotten the hour massage and the 90 minute. I always tip good. sometimes with cash and other times on my card. This time I was giving 10$ tip. it was on a 90 minute. that cost $45 so $9 would have been over 20% tip. She told me the minimum is $15 ! that is like 35%!! you cannot tell the customer what to tip. a tip in itself is just that. you can leave zero. not nice but a tip is not a guarantee. to enforce customers to leave what you want is wrong. if that is the case, just make the massage $60. I sometimes give more and sometimes less but never under 20%.. this business is out of line for tipping practices