I find the local kink communities are pretty poly friendly. There is an Edmonton group that aims for monthly get togethers, they post on Facebook fairly regularly. I don't feel a strong need to attend many gatherings, I have a strong connection with my friends so I don't feel the need to network as much. Many of the get togethers are 'family friendly' which doesn't interest me at all. I enjoy kids, but hanging out with poly folks can mean some fairly adult conversations so I don't feel I can be open and truly comfortable when there's kids running around. I could be assuming, but I think the poly folks with kids spoke up loudly about being able to drag their broods along. I understand that poly relationships can be difficult to schedule and must be even more so with kids in the mix. They really are a great group of people though, I would highly suggest anyone in the Edmonton area checking out the Facebook page for details on future meetings.
"There are worse crimes than burning books. One of them is not reading them." - Ray Bradbury