I watch too much TV and need answers

[Somanyquestionswithoutanswers]

Why don't Americans have any window coverings in their beautiful open plan New York apartments? Privacy aside doesn't the light stop them sleeping?

How do they keep those apartments tidy? The ones where the bed is in the living room, where do they keep all their stuff?

Any other questions from TV?

When people slam their car doors shut, why are the windows often wound down?

Do people in America really use last names all the time. Mainly see it on police type shows