Glen Island, Glenn Miller
One recording in particular of Glenn Miller and his orchestra, broadcast on the radio probably in the early 1940s, started with an announcer introducing Miller to the listeners and the dancers and club-goers at Glen Island Casino in New Rochelle, overlooking Long Island Sound. The song was probably "Moonlight Serenade," and the tone of the announcer's voice, the easy pace of the music, and the invocation of "Glen Island Casino" and "Long Island Sound" were as evocative of an era I never knew as anything in Gatsby.
If you're in the area, go to Glen Island tonight to hear our friend Barbara Davis, the New Rochelle City Historian, give a presentation about the history of Glen Island. She'll talk about the Glen Island Casino and the Swing Era, as well as the island's place in Native American and Revolutionary War history, and lots else. It's free, at the Glen Island Harbor Club (which unless I'm mistaken is the updated and tackier version of the Casino) from 7:30 to 9:30. Two County Legislators, Jim Maisano and Vito Pinto, are sponsoring the talk.
I don't know if Barbara has a copy of that Glenn Miller recording. If she does, it'd be a great way to start her talk. Here's a version that unfortunately doesn't include the radio intro that I remember.