I've bumped into some interesting people at bars. Dave Chappell lives a couple of miles away and I see him at a local restaurant bar fairly often. I don't think he drinks alcohol though.
Ran into Spooner Oldham in Memphis (don't worry if you don't know who he is, I had to google it)
https://www.rockhall.com/inductees/spooner-oldham?gclid=CjwKCAiAjanRBRByEiwAKGyjZQK3yfmZJ7s3I AgGoHn71TBC6SfK8p18C6yS3ojklHvIOlndDWs4hxoCsbkQAvD _BwE
I helped Tom Austin write a book after meeting him. He and Bob Gaudio founded the Royal Teens in 1958. Tom is the drummer, Al Kooper is on keyboards, and Bob Guadio plays guitar.
https://www.youtube.com/watch?v=2OOTr04YTwE
I wrote a book about George Montgomery, though I didn't meet him in a bar.
https://www.amazon.com/Ohio-George-Montgomery-Racings-Gasser/dp/0692680438
A couple of the coolest were a guy I met at a bar in Grand Rapids, Michigan. He is a freight pilot for some charter freight company. After talking for a few minutes we discovered that he just moved in to the house across the street from me.
Also, while in the Virgin Islands last February we ran into a couple at the bar that was treated like royalty because they had spent a month at the hotel every year for 20 years - in the room right next to ours. Got to talking to them and found out they live about 10 miles from us back in Ohio.