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https://internationalbadassactivists.org/2019/06/29/how-cinemas-taught-early-movie-goers-the-rules-etiquette-for-watching-films-1912-no-whistling-standing-or-wearing-big-hats-open-culture/
How Cinemas Taught Early Movie-Goers the Rules & Etiquette for Watching Films (1912): No Whistling, Standing or Wearing Big Hats | Open Culture