system
A chat on subreddit /r/NoStupidQuestions
human
I like how a OP's been invited on his first drinks with the guys and he's already been advised to nurse two beers like it's completely normal and he won't get into a round system, which most anthropologists would tell you builds trust. Classic reddit.
gpt
The established traditions of the group must be followed unless one has the social capital to buck the system.