"Scotch Please" joke

A bartender asks a guy sitting at the bar, "What'll you have?"

"A scotch, please." The guy replied.

The bartender gives him the drink and says, "That's five dollars." "What are you talking about?" the man replies. "I don't owe you anything for this."

The fellow sitting next to him at the bar was a lawyer, who decided to get into the discussion. "You know," he tells the bartender, "he's got you there. In the original offer, constituting a binding contract upon acceptance, there was no stipulation of payment."

The irritated bartender says to the first guy, "Fine. You beat me for a drink. But I don't ever want to see you in here again."

The following day, the very same guy comes back into the bar. The bartender says, "What the heck are you doing in here? I told you not to come back!"

The guy replies, "What are you talking about? I've never been in this place before in my life!"

The bartender looks confused. "I'm sorry then, but this is really weird. You must have a double."

The man immediately replies, "Thank you very much! Make it a scotch."