I like PPrune a lot. It's my only option. We don't have a union here, nor a pilots' association, in the sandbox.
After I retired from AC, the three amigos running the OAC site declined to allow me to continue participating there, so...
PPrune is it!
It is a well moderated site, not too PC, as there are more truths to the issues than Trudeu's "just society" would allow the typical Canadian to comprehend. It's good for old boy contact stuff as well - I was able to re-establish contact with an old friend some years ago and that was real nice. I like to keep up as much as I can with what's happening in Canada. I wish there was more participation and posting actually!
Happy Contrails