There is the rare occasion in which someone (always male) walks into our clinic and promptly walks back out before I can talk to him. I've learned that these are people who are seeking the services of our neighbors next door at the "spa" and have accidentally stepped into the wrong place.

Today I had one come in, realize he was in the wrong place, but try to cover it up (of course I didn't realize it until afterwards):

Me: Hi, can I help you?
Spa customer: Uhhh ... is this a clinic?
Me: Yes, it is.
SC: Ummm ... what kind of clinic is this?
Me: It's an acupuncture clinic.
SC: Errr ... what's ... acupuncture?
Me: Oh, it's a natural method of healing where we use very fine needles on the body.
SC: Is ... it ... therapy?
Me (slightly confused, but whatever): Physical therapy? Yes it is.
SC: Let me get a business card.

Patient leaves, and makes a beeline for next door. (I can always tell when they have customers because you have to ring the doorbell before they let you in, and the doorbell chime is really loud and sounds like the clock has happened upon the hour, identical to the clock tower's song at UT Austin.)

It seems weird to me that a dude who has the guts to go to a "spa" in broad daylight can at the same time be ashamed and embarrassed to have inadvertently stumbled into the wrong establishment. But what do I know.