According to articles, there was only one exit door....firemen had to break thru a wall to allow people out.
The fire codes in many foreign countries are not so good. Indeed they were so good hee in America until after the Triangle Shirtwaist fire and the Cocoanut Grove fires.
Even so pyrotechnics should not be allowed with bands.
What we have is amateurs playing with fire in closed places.
A sure fire menu for disaster.