Meetups

Active (in past 2 years)

France, Paris https://www.meetup.com/RecSysFR/

Netherlands, Amsterdam https://www.meetup.com/recsysnl/ and http://www.recommenders.nl/

UK, London https://www.meetup.com/RecSys-London/

Germany, Berlin https://www.meetup.com/RecSys-Berlin/

USA, New York https://www.meetup.com/RecSys-New-York-City/

Inactive

Ireland, Dublin (1) https://www.insight-centre.org/content/first-ireland-recommender-systems-meetup
and (2) https://www.meetup.com/Recommender-Systems-in-Action/

Germany, Berlin http://recommenders.de/

USA; Bay Area https://www.meetup.com/Bay-Area-Recommender-Systems/

Switzerland, Zurich https://www.meetup.com/Zurich-Recommender-Systems/

Czech Republic, Prague https://www.meetup.com/Prague-Recommender-Systems-Meetup-RecSys-Prague/