I used to go to a massage/chiropractor center that had physical therapists, dieticians, etc. I usually tipped a small amount ($5) just because I thought that the massage therapist is paying rent for the room etc and I just felt it was the right thing to do. I also usually tip my hair cutter and he and his family own their business. If I was only going to a place once, or not going back, I would probably not tip since they are their own business.