The bartender asks the guy sitting at the bar:
- What'll you have?
The guy answers:
- A scotch, please.
The bartender hands him the drink, and says:
- That'll be five dollars,
to which the guy replies:
- What are you talking about? I don't owe you anything for this.
A lawyer, sitting nearby and overhearing the conversation, then says to the bartender:
- You know, he's got you there. In the original offer, which constitutes a binding contract upon acceptance, there was no stipulation of remuneration.
The bartender was not impressed, but says to the guy:
- Okay, you beat me for a drink. But don't ever let me catch you in here again.
The next day, same guy walks into the bar. Bartender says:
- What the heck are you doing in here? I can't believe you've got the audacity to come back!
The guy says:
- What are you talking about? I've never been in this place in my life!
The bartender replies:
- I'm very sorry, but this is uncanny. You must have a double.
To which the guy replies:
- Thank you. Make it a scotch.