I found this very amusing on a website that promotes a monthly party for people who went to high school in New York. I particularly like the one about identifying the subway line by color, which is a recent pet peeve of mine after I heard a bunch of youngsters that I work with identify the lines they take to get home (mostlhy red).
My mother, on the other hand, refuses to switch to the number/letter identification system and will only call the 4/5/6 "the Lex," which is a habit from one generation earlier than mine. (And yes, this mention will generate a series of emails to me from my mother, but that is the risk I take. And since I mentioned that, it will probably morph into a phone call instead of email. And now that I mention that still, she will probably remain silent. Mission accomplished. Now she's mad. Sorry.)