My dentist's office has a TV that is usually on the travel channel or something like that. However, they also have small TV's on each chair where they do their work and let the patient have the remote while waiting. Those TV's serve a dual purpose, they allow you to view your dental X-Rays during the dentist's explanation.
Very well, I do not doubt that there are televisions in doctor's offices. I just haven't seen one myself, and I suppose I'm better off for it. I HAVE seen televisions in car showrooms, oil change places, barbershops, and assorted other waiting areas, but they are almost always set to sports channels. I cannot imagine anyone waiting for service anywhere that would use the time to get caught up on politics, anyway.