Since it's the weekend not many rooms would be open, a well known place is the big computer lab in the HP centre though Solaris and there's this one room full of Cintiq's 8D that's all i know since all my classes are in the Hp centre OTL. Basically we just have a medium sized classroom in the main building, sadly not in the nice looking HP centre because they don't like the idea of people that arn't students hanging out in that building.
The only way i can host in nait is if it's considered a 'club event/activity' and that the head of the club agrees to it. He look like a pretty layed back guy but I don't know how he'd feel about this happening every month, a event form has to be submitted each time there's an event/activity.