The Action Design Network is a non-profit organization founded in December 2012 to promote the use of behavioral economics and psychology in product design. The group has quickly grown to 3,500 members with monthly events in multiple cities across North America. Here's the global hub: http://www.actiondesigner.net
We're the Toronto chapter, called Toronto Action Design, or TAD for short. We're just starting out, so if you'd like to get involved, we're looking for people to join our organizing committee, and pitch in.