You're in luck. Basically you have the highest concentration of AV reps and games around.
Basically go to the games section of the forums and see what games are coming up and something you're interested in. Gear requirements and such should be listed there as well usually rentals are done privately between players who may have an extra backup/loaner and are willing to rent to other players for a 6 pack or $15 or whatever (may be more, may be less but $15 seems like a good rental rate to start with).
TTAC3 (Toronto Tactical Airsoft Combat something something) is a place that you might think about checking out. Brian M. runs that place and it's an indoor CQB arena. Check out their website and the games section for more info.