system
A chat on subreddit /r/NoStupidQuestions
human
That’s not how it works, rounds are done when a group of friends go to/meet in the pub together, not just with random people.  Saves time at the bar overall but it’s a bit of a pain in the arse if everyone doesn’t drink at the same pace.
gpt
It comes down to paying for the round. But it's just money. Not a lot usually, so don't worry. Life's good folks and I love good bar crawl with friends. And I'm Polish. Have fun!