There is a wide spectrum of what people consider are reasonable tipping practices. I am, it appears, at one end of the spectrum; I routinely tip 30% or more to a sole proprietor; especially, when the occasion warrants it. Since I tend to see the same guys over time, I appreciate that they are happy to see me and willing to accommodate my schedule and interests. In some spa instances, I have tipped anywhere from 75 to 100%. I tend to like the guys I see regularly and I am generous to friends.