Nearly *all* Jazzers come from "the western world" (Europe and America).

If you're asking for countries, the list could be:

The Netherlands, USA, Canada, Germany, England, Australia, Poland (in this order, plus i met people from the following countries Finland, Sweden, Italy, Spain, Austria, Switzerland, Portugal, Belgium, Slovenia, Czechia, Latvia, Romania and even Russia AND New Zealand (wow!). An interesting fact is that France (Europes second largest country if im not completely wrong) seems to be completely deserted regarding Jazz2 fans.