I go to Whitby as my main game locale; and I hit up Ultimate Airsoft in Toronto when I can.
I don't mean to plug something, and I hope I don't piss anybody off; but I have a facebook group that I keep trying to drag people into to keep them connected. It's oriented to Durham Region airsoft players; it's called the Oshawa Deathmatch Community.
Technically it's open to Paintball and stuff too, but if it's not your thing just ignore it. (We're 90% airsofters anyways).
<<< Anybody's welcome to join.
So yeah. Entry fee to Whitby Airsoft is $10, and you need to be 18+. Ultimate Airsoft I believe is Parental Supervision if you're under 18... UA is a little more expensive though. Entry fee right now is $25 on weekdays, $35 on the weekend, and until the end of august you're allowed to bring your own BB's (normally they require use of their own on-site BB's).
UA is 350fps hard limit.