I heard of one highschool in Toronto that does allow adult students. You can specialize strictly in photography. The classes are free - you just pay for the materials you use...I'm off to see if I can find out what that darned school is called.
Central Technical School
It was recommended to me by a 50+ yr old photography enthusiast I met at this year's Toronto Camera Show. He was a student...apparently they have great facilities, he nearly talked me into going...but that would be a heck of a commute