In my experience, there isn't a single large, civic theater in Canada that is staffed by volunteer ushers.
I guess my confusion revolves around how you not only accomplish being the only city in Canada to run a large civic theater with volunteer ushers, but then also get those volunteers trained in the mandatory skills required of ushers - like building evacuation training (monthly as mandated by the Fire Dept), FoodSafe, Serving it Right, and Level 2 First Aid - and THEN you have to get into the actual training to perform the specified functions of the job.
Perhaps small venues can get away with using a multitude of volunteers, but that (at least in my experience) simply doesn't appear to translate into the same ability in a large, civic properties like theaters and arenas.
Perhaps being an usher in a large civic theater has more to it than first meets the eye, and the reason there are no volunteer ushers in large civic theaters is reflected in that thinking?
The Superbowl operates with 10,000 volunteers, the Commonwealth Games here used volunteers, the Masters Golf here uses volunteers (they pay the tournament $80 to be there!), the HarbourCats use volunteers (27 games in a span of 63 days!). So does Symphony Splash and all our runs.
No reason why this model can't work, if we just try it.