Time to go home.....?
After he finishes the drink, he peeks inside his shirt pocket then he orders the bartender to prepare another double vodka. After he finishes that one, he again peeks inside his shirt pocket and orders the bartender to bring him another double vodka.
The bartender says, "Look buddy, I`ll bring ya` vodkas all night long. But you gotta tell me why you look inside your shirt pocket before you order a refill.?"
The customer replies, "Im peeking at a photo of my wife. When she starts to look good, then i know its time to go home.!!"