The apartment I'm living in now with my boyfriend is a 400 square foot one bedroom. It may not be as difficult as Erin's life in 250 square feet, but it still requires some creativity to make it work.
For example, we both love to entertain. I often hear people complain that their apartment is too small to have people over but as I've mentioned before, I don't let that stop me. In this apartment, I've discovered two tips that make it possible to entertain in a small space: 1 - rearrange furniture and 2 - have convertible furniture.
We are lucky enough to have an open kitchen/living space that allows us to rearrange as needed. We also both inherited quality wood dining tables that can expand or contract as needed. Mine has extra leaves that can be added, and his can be folded into a small narrow side table.
For dinner parties, the couch is pushed against the wall with an accompanying coffee table. Then, our two dining tables can be fully expanded and pushed together in the middle of the room, in total providing seating for nearly 10 people. Or for bigger parties, the tables can be folded up out of the way against the walls or bookshelves to create open space for dancing and mingling.
When the party's over, the couch goes back into its place in front of the TV, one table folds back into a side table next to the couch, and the extra leaf comes out of the other dining table, returning to a table for two.
All that rearranging might seem like a pain, but that's just how life is in NYC. And you might be surprised at how many people you can actually fit in your apartment, if you try.