What would someone need to do to elevate their relationship with you from last-name-basis to first-name-basis?
I had professors call me 'Mr.' and some hotel staff and such but I'm just Sean to everybody, there is no elevation in that way, the only elevation is 'do I answer the door when you knock' THAT is the test, friends
I've never really been in a setting where people (aside from some teachers/profs) are normally referred to by their last name. If someone did that to me i probably wouldn't even look over bc it'd be so weird