Groupe d'utilisateurs de PureData de Montréal, QC the longest-running and most intense pd user group in the world.
exists since december 2003.
45 meetings so far.
each meeting lasts at least 3 hours, max 5 hours, most of the time 4 hours.
attendance ranges between 5 and 25, average 15 people.
nearly every meeting contains at least 2 presentations, usually 4 or more.
there is a web-page at http://wiki.dataflow.ws/PdMtl (some recent meetings might not be listed, but the mailing-list archive always has those announcements)
there is a mailing-list at http://lists.artengine.ca/cgi-bin/mailman/listinfo/pdmtl
meetings are mostly in French, often with one or two presentations in English.