Eleanor: Hey, buddy, it's my birthday. One free margarita please.
Bartender: Well, happy birthday. Can I just see some ID?
Eleanor: No.
Bartender: Why not?
Eleanor: Well, because it's not really my birthday, I just want a free margarita.
Bartender: Well, if I just randomly gave you a free drink, I'd have to do it for everyone. Pretty soon I'd go out of business.
Eleanor: [chuckles] Then don't do it for everyone. Just do it for me because it's my birthday.
Bartender: Happy Birthday.