Hey, I have an answer to the question I raised a while ago, about how to refer to areas of New York City. It turns out that the US Postal service classifies certain parts of NYC, like Staten Island or Brooklyn, as separate towns, even if they're technically still part of New York.
So maybe that's why people will say, "I'm from Brooklyn" in place of "I'm from New York City."
I wonder if other big cities also have neighborhoods that are classified as their own cities. I know that's not the case with Portland or San Francisco. Sometimes, you'll hear them mention a San Francisco neighborhood on "Full House" or "Star Trek", but it's usually pretty clear that the Marina District or Chinatown or wherever is still part of San Francisco proper.