As used in this chapter the following terms shall have the meanings indicated:
All buildings or parts of buildings not included under “theaters,” where 100 or more persons assemble for entertainment, instruction, worship or dining purposes.
An assembly hall built in connection with a school, club, church or society building and used only for private gatherings and not rented for public use. Every other assembly hall is a public assembly hall.
All buildings or parts of buildings used for theatrical, operatic or motion- picture performances of a public nature, except as provided in this section.