system
A chat on subreddit /r/NoStupidQuestions
human
Oh so it’s like an unwritten rule. Tipping is technically optional but in practice it is never optional. It is expected but cannot be pointed out due to the technicality.
gpt
"in practice it is never optional" is a bit strongly worded. It *is* in fact optional, but there may be social or other, not-all-that-serious consequences. There are plenty of people who rarely tip, or always tip $1, or actually make a big judgment about "how good the service really was," or blame the server because the food was too spicy, etc.