The comprehensive list?  If someone would like to determine the exact number of active cafés, I recommend the following google searches:  for british council organised ones, and  for US, Canada, possibly Australia, and elsewhere. I also have a suspicion that the New Scientist has listings of these in its print edition.  I've taken out from the article the following list that I verified on the web: : such as Australia, Canada and the United States (e.g. Palo Alto, Colorado, San Diego, Boston, Pittsburgh, Muskegon (MI); Tokyo, Singapore, Buenos Aires; Slovenia). - '''' 