American here. Really it’s about context. On busses is can be polite to thank the driver when exiting. Depending on the barber saying hello to everyone might be normal too. But no I don’t think I’ve ever walked into a dentists office and been like’ hi! Everybody!” It’s more a walk in tell someone you’re here and sit on your phone until called.

Excelston was my first but I feel like the show really hit its stride with Smith and Tenant and theyre sort fo tied for my favorites