A customer was continually bothering the waiter in a restaurant; first, he'd asked that the air conditioning be turned up because it was too hot, then he asked it be turned down cause it was too cold, and so on for about half an hour.
Surprisingly, the waiter was very patient, walking back and forth and never once getting angry. So finally, a second customer asked why didn't they just throw out the pest.
"Oh, I don't care." said the waiter with a smile. "We don't even have an air conditioner."