A man walks into the front door of a bar. He is obviously drunk. he staggers up to the bar， seats himself on a stool， and with a belch， asks the bartender for a drink.
The bartender politely informs the man that it appears that he has already had plenty to drink——he could not be served additional liquor at this bar but could get a cab called for him.
The drunk is briefly surprised then softly scoffs， grumbles， climbs down off the bar stool， and staggers out the front door.
A few minutes later， the same drunk stumbles in the side door of the bar. He wobbles up to the bar and hollers for a drink. The bartender comes over， and still politely——but more firmly refuses service to the man due to his inebriation. Again， the bartender offers to call a cab for him.
The drunk looks at the bartender for a moment angrily， curses， and shows himself out the side door， all the while grumbling and shaking his head.
A few minutes later， the same drunk bursts in through the back door of the bar. He plops himself up on a bar stool， gathers his wits， and belligerently orders a drink.
The bartender comes over and emphatically reminds the man that he is clearly drunk， will be served no drinks， and either a cab or the police will be called immediately.
The surprised drunk looks at the bartender and in hopeless anguish， cries “Man！ How many bars do you work at？”