The people of San Francisco never refer to their city as “San Fran” or “Frisco” and, from what I understand, really don’t like it when other people do.
No one from Philadelphia uses the nickname “The City of Brotherly Love”, at least if it’s not dripping with sarcasm. On the other hand, they frequently refer to Philly.
What are some other nicknames that people actually use for their own cities? (Please note that LOTS of places use “the City” - I’m thinking here of unique nicknames, not just descriptions.)