For the record, the Plaza Premium Lounges in YYZ are terrific. They are WAY better than any of the regular domestic airline lounges. They have a very nice selection of hot food (gasp!) that actually tastes quite good, and a fairly wide selection of alcohol.
If you enter the lounge with your PP card, you and your guests can stay there as long as you want. Otherwise, they charge $30CAD for 2 hours or $35CAD for 3 hours.