I suppose this would be "Rickdriving"?

You could probably locate the exact location of the microphone by driving around in a carefully planned pattern with unique, known songs playing.

Looks like someone's done it:

12:36 AM Flores LATIN MAFIA

12:36 AM Never Gonna Give You Up Rick Astley

12:32 AM El F Natanael Cano & Junior H

https://x.com/fulligin/status/1841022534848036949

Different old songs (still on Shazam) in lat and long direction, if you find two of them you have the exact location.

Could also place a directional speaker on top of your cars roof to not listen to it yourself or interrupt neighbors, just to be able to locate it.

Where exactly does music play in public this often? Maybe it's outside some kind of store?

Someone did it - October 1st 12:36AM

surely you meant Pretty Fly for a WiFi?

Stick to the streets that have bus lines!

Edit: There's clearly a bus stop right near the pole.

It seems like someone found this because it showed up one or two songs ago.