This place finally got back to me about open sessions on the trampolines and it turns out that Fridays and Sundays from 6-9 are open session times. They are currently doing some renovations and are closed for a week but when they open back up, the open sessions are $10/hour with a minimum of 3 people. I know a bunch of people used to hit up airbourne for tramp sessions but that place is kinda far for those of us in the Oshawa/whitby area. If anyone is interested in checking this place out with me, hit me up with a pm or reply in here an let's get something organized.
Personally, I want to get a bit of air time practice in before the snow starts flying :p