A Gorilla Walks into a Bar

A gorilla walks into a bar and orders a martini to the amazement of the bartender.
When the bartender gives the gorilla the martini, he’s further surprised to see that the ape is holding a $20 bill.
The bartender takes the $20, then he decides to see just how smart the gorilla is, so he hands the gorilla on $1 change.
The gorilla quietly sips the martini until the bartender breaks the silence.
“We don’t get too many apes in here,” he says.
The gorilla replies, “At $19 a drink, I’m not surprised.”