The TV show Cheers was nearly canceled after its first season, but the theme song, "Where Everybody Knows Your Name," was very popular. To satisfy viewer demand, the theme was made into a full song and released as a single.
Who writes a song about a name they found in a phone book? That's just one of the everyday things these guys find to sing about. Anything in their field of vision or general scope of knowledge is fair game. If you cross paths with them, so are you.