This was the strangest encounter I've had with a customer...
During bad weather sometimes we're asked to stay open overnight... because we'll have thousands of passengers stuck in the airport with cancellations blah blah blah. Anyway, I did this a few months ago. So around 3am I had this weird old hispanic guy come up to the counter... probably in his 70s, he's in a red suit, wrapped in a blanket, pushing his own wheelchair. He barely speaks a word of English... and I really do not speak any Spanish.
Him: "Cafe....!"
Me: "Uh, what can we get for you?"
Him: "Cafe.... cafe... smoke?"
He starts mimicking the act of smoking, and shrugging his shoulders. I tell him that there's no smoking. He seems to understand, and sighs disappointingly, shaking his head "Cafe no smoke, no smoke..." He comes up closer, looking at the menu, and starts pointing... "Cafe?" So I ask him if he wants coffee. He says, "Cafe!" and nods his head. I point at the cups and ask him what size. He's confused. I make hand gestures to try to indicate big or small... he understands, says "Cafe!" and pinches his fingers together slowly to mean "small".
So I go and get him a tall coffee, come back and discover he's learned a new word. "Tea." That's all he says. I ask him if he wants tea... but this goes nowhere. He's making hand gestures and just saying "tea" and... I don't get it. I gather he was trying to ask something but I don't know what. He gives up and I tell him the price for the coffee.
He doesn't leave. He stands there at the counter, sips his coffee, and then proceeds to mime a story about (so I gather) how his daughter in Mexico knows English, and how a lot of people in Mexico know English, but he doesn't. This goes on for a good 20 minutes. Then he just stands around silently, sipping his coffee. I didn't have any other customers for a whole hour, so... that was fun. :/