Storyville

Redlight district (party district) in New Orleans, similar to Congo Square.

They had 800 bars and 200 brothels. If that's not the epidome of a red-light district I don't know what is. The brothels would usually lack these jazz bands, but the bars would have those bands. On the contrast the brothels would have a lot of piano players though. These brothels would host a lot of Ragtime.