For more background and some interviews of business owners there, see Morgan Spurlock's movie, The Greatest Movie Ever Sold. He's the guy who did Supersize Me and some tv shows.
He traveled to São Paulo and this movie shows footage of the city. I learned of the city's ban from that movie.
(Edit: thanks Icebrain for correcting my spelling)
The movie shows before and after images and interviews people there, directly answering the question of the post I responded to.
After seeing the movie I even looked online to see if anyone posted those specific scenes (of São Paulo) online. I didn't find any, but if anyone else found them, please let me know.
He traveled to São Paulo and this movie shows footage of the city. I learned of the city's ban from that movie.
(Edit: thanks Icebrain for correcting my spelling)