I'm not sure if there is a "massage" type, but if you ask for a happy ending, I don't think your insurance would cover it.
I got to one on a semi-regular basis - part for mild injury, part cause I'm getting old, and part cause I feel better afterwards. Mine isn't the typical "cracker"-type, but rather uses a computerized tool that sorta hammers things back into place. It's an interesting way of doing it, and seems to work. The last "cracker" I had was only about 5'6" and 160lbs. He did one of those turn-on-your-side and twist maneuvers, but it didn't work until he jumped up on the table and used all of his bodyweight and strength to get me to pop!!