Who serves coffee in a coffeeshop?

I answered a headset call the other day only to hear the first words out of the lady's mouth as follows, "Do ya'll serve coffee here?" And I know she is not blind because she wouldn't be driving if she were, so it rules that out. I just wonder what runs through a person's mind when they say something like that. And then I think, maybe I SHOULDN'T give her decaf because she obviously needs caffeine to function on the simplest level in society. We wouldn't want to unleash that kind of stupid onto everyone else...would we?