I was interested in answering this question, so I did some research.
Here are the links to the fire bylaw: Fire By-law | City of Vancouver
This page shows the calculations needed to figure out the maximum number of people:
Occupancy Load Regulations and Calculation package
http://vancouver.ca/files/cov/occupancy-load-calculation-package.pdf
“This guideline is set up pursuant to Vancouver Fire Bylaw Sentence 2.7.1.3., on determining occupant loads for assembly occupancies and licensed beverage establishments.
Any assembly space more than 60 persons, including a licensed beverage establishment, will be required to comply with the following procedure.”
What’s also interesting is how the space calculations differ given the nature of the space. Note the size for “School shops and vocational rooms”