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
People do the same thing everywhere... I've definitely "done rounds" with friends when drinking in the states. Sometimes it's just easier if one person buys the table drinks vs everyone getting shit themselves.