It seems Grandma or Grandpa Snail brought home this postcard in the 1950s.
Grandma Snail was a nervous traveller who rarely left Los Angeles, but she’d fondly recall one or two business trips to New York. She went to someone’s apartment there–tiny, but beautifully decorated, packed with things to look at. That represented the New York lifestyle to her, and she was fascinated by it. True to the song, she’d also tell me how she never wanted to go to sleep in New York, knowing there was still so much going on out there.