Not exactly an overheard, 'cause it happened to me...

In an elevator in residential building in Chinatown, two neighbors eye each
other up:

Lady going to Fifth Floor: ...
Lady going to Third Floor: Don't you have a job?
5th Floor, stentoriously: Why yes, I'm a college professor.
3rd Floor: Hmrph.
5th Floor: Do you have a job?
3rd Floor: I work in SWEATSHOP.
5th Floor: Oh. That must be hard work.
3rd Floor: Yes. Very hard work.
5th Floor: ...
3rd Floor: And I work AT NIGHT.
5th Floor: Gosh. Making clothes?
3rd Floor: Good-bye.