Haven't found many in Brazil. But Argentina is full of highly civilized cafes.
- Often an interesting part of the MediaSystem as people go there to talk to each other.
- TheSanctuaryCafe ... where some ThoughtStormians can sometimes be found, live, on Saturday mornings. (But PhilJones only on rare occasions when I'm in the UK.)
- Beloved of CreativeClass I suppose.
- DeliciousLibrary, a software company run from a cafe : http://www.wired.com/news/mac/0,2125,66276,00.html