1912 theater etiquette slides projected before the show or during intermission, forbid bad behaviors that theater owners saw in early movie audiences: whistling, talking, bothering women, and wearing tall hats.
Before cell phones, early cinemas had to remind patrons to remove their giant hats
Many films from the silent era relied heavily on the appeal of their star and the fashion worn. Mae Murray helped usher in new trends in fashion thanks to her film wardrobes. Here is an ad for her film "Jazzmania.