Comment by deanCommie

You will never convince Europeans of this. They simply seem to be unable to grasp that (1) cultural norms about introversion/extroversion and friendliness are not universal, and so the default baseline IS more outgoing, social, friendly, and extraverted in North America, and (2) because of the other differences in service industry culture [not necessarily themselves all positives but nevertheless relevant], the service industry in America optimizes for extraverted and friendly people.

So yeah, when the super friendly waitress comes over and asks the table "how is your day going", they're not forcing a smile for a tip. It helps, but they're most likely naturally outgoing and friendly and genuinely curious.

When you grow up with this environment, moving to Europe is adaptable (have done so), but whenever you go back home it is a breath of fresh air.