A man walks into a bar, drinks a couple of beers, and prepares to leave.

The bartender tells him that he owes $9.

“But I paid, don’t you remember?” says the customer.

“Okay,” says the bartender, “If you said you paid, you did.”

The man goes outside and tells the first person he sees that the bartender can’t keep track of whether his customers have paid or not.

The second man walks in, orders a couple of beers, and later pulls the same stunt.

The bartender replies, “OK, if you say you paid, then I suppose you did.”

The customer goes outside and tells a friend how to get free drinks.

The third man hurries into the bar and begins to drink highballs.

The bartender leans over and says, “You know, something funny happened tonight. Two men drank beer, neither paid, and both claimed they had. The next guy who tries that stunt is going to get punched in the — ”

The man interrupts, “Do not bother me with your troubles, bartender. Just give me my change and I’ll be on my way.”