As someone living in an apartment in a US city: I don't know a single other person in my building, and this is not abnormal. The only times I've ever interacted with someone else is if there's some sort of issue (noise, typically) or to hold a door for someone.
As someone living in an apartment in a US city: I don't know a single other person in my building, and this is not abnormal. The only times I've ever interacted with someone else is if there's some sort of issue (noise, typically) or to hold a door for someone.