The version that I remember is this one
https://upload.wikimedia.org/wikipedia/commons/thumb/9/92/De...
but I'm sure there are other versions sending the same message!
> everything is concentrated to a district
I've also noticed this in São Paulo, Brazil, which reportedly has about 60 streets with particular kinds of specialized retail.
https://pt.wikipedia.org/wiki/Ruas_de_com%C3%A9rcio_especial...
(I remember visiting the commercial kitchen supply street because I wanted to bake some cupcakes, and cupcake tins were considered a specialist item. I also feel like I once wandered into a street that specialized in plastic flowers—I guess probably R. Cantareira, which also seems to do a lot of other plastic stuff, or part of the nearby R. 25 de Março?)
> food was great though
The best I've ever eaten anywhere in the world, I think!