I think some cities manage to foster some sort of brand loyalty among their citizens – Paris, Barcelona, New York, Chicago, San Francisco. Not so sure about individual boroughs/quarters though – maybe those with a very clearly defined culture (Castro in SFm Geenwich in NY, Mitte in Berlin). I guess Notting Hill and Camden Town get closest in London. But these images are invented by media rather than reflect reality. Of course Borough Market has done wonders for SE1. Interesting post.