Sounds like this minhag came from Billy O’Hara. And what type of alcohol? Does it change depending on how bad date went or what girl looked like? Sounds like this is an explanation of where the rabbi/ jew … walks into a bar jokes came from.
and speaking of walk into a bar joke,
A string walks into a bar with a few friends and orders a beer. The bartender says, “I’m sorry, but we don’t serve strings here.”
The string goes back to his table. He ties himself in a loop and messes up the top of his hair. He walks back up to the bar and orders a beer.
The bartender squints at him and says, “Hey, aren’t you a string?”
The string says, “Nope, I’m a frayed knot.”
(and yes I am aware of jokes thread, but this is knot just about a single thread)