Sleep clinic or dentist

I went to the dentist this morning and while I was waiting forever (very unusual) in the lobby for my turn to get my teeth cleaned, I was watching this older woman sleep in the chair while she was waiting for her turn to go in. Finally they called her in, and I was left behind. Then came my turn and I was sitting in my comfy dentist chair, and all of a sudden I hear this weird noise. It sounded like somebody snoring, but I thought, I'm sure that is not it. It must be some tool cleaning device that has a low murmuring sound. After half an hour I was finished with my appointment and I was waiting for our wonderful doctor Reed Robinson to come and check me out and consult me on my request for new veneers so I can have a more beautiful smile and a possible root canal, and I kept hearing the sound again. I looked back and saw the same woman, who was snoozing in the lobby earlier, sprawled out on the dentist chair, with the gas nozzle on her nose and just snoring like any good man (Rod, Steve, Craig, Greg etc.) might snore. I asked Reed if this, in fact, was a sleep clinic or a dentist. He said that she likes to come to the dentist, put on the gas and go to sleep before she is being worked on.