Not exactly what you´re after, but there is a network of centres where they sell massage machines, called Ceragem. These are mechanical and heat massagers.
The point is that you can have a 40-minute trial session for free. I know because of having passed one the other day on C/Juan Pantoja (by Cuatro Caminos). The website is http://www.ceragem.es though they have cunningly omitted the addresses of the centres.
Nevertheless there are several in Madrid capital and many others around Spain, according to the leaflet which I picked up. AFAICT we are talking about a reputable business.
The phone number given on the website is 91-4902000 -- Stephen
Posts: 319 | Location: Ferrol (Coruña) and Ambridge (Borsetshire) | Registered: 08 March 2003