system
Given the following post, respond as if you're commenting on Reddit:
human
[Futurama] Fry lives in Bender's apartment's closet. But How?

Human beings require things such as temperature control, air flow, and plumbing: three things that would presumably not be necessary in a 31st century robot's apartment's closet.
gpt
So Bender's apartment building was originally built for humans, however with the market being what it was they changed over and decided to market it as a robot only apartment building, and renamed it the Robot Arms.  

That got a bunch of robots to rent there, however while it was marketed for robots they never actually said humans couldn't live there.  In fact, its against New New York rental codes.  Flip side is that humans and robots don't tend to mix well when it comes to living quarters, but that's another story.

So Bender was shown the renovated apartment, which very small because he didn't need much sleeping space.  The remainder of the apartment was in the closet, which was the size of a full sized apartment.  

When Fry moved in again, Bender told fry about the window in the closet and Fry moved into that area.  That 'closet' had a bedroom from the apartment's former days as a human apartment.  Bender also moved into the closet.  There was more space in there and with Fry there was a reason for him to use it.  Though if asked he's still claim to stay in the main part of the apartment, the 4ft by 4ft main section.