I'm about to go for a 1 hour massage that cost $110. It was given to me as a gift (I wouldn't of been able to afford that right now). I'm pretty tight on money, I want to tip but if I tip 20% (which I normally do at restaurants) that would be over $20 which I really don't have to spare. Like I said, the massage is a gift and I don't have budget for luxuries at the moment. What is a reasonable tip for a 1 hour massage? I understand that this is part of the therapists income so don't want to be too stingy..