There was a scene in Clash By Night that struck me and that I keep coming back to. It is when Mae (Barbara Stanwick) and Jerry (Paul Douglas) go on a date to the movies. In those days the films had many showings that included a second, usually "B" film, newsreels, cartoons (often several), a short, or two (like the "Extras" that TCM shows between showing) that might be a travelogue, or some type of documentary. It was not uncommon to buy your ticket while the show was already going on, and as Mae says to Jerry: "This is where we came in".
You did not see the beginning of the film, but you could sit through everything and then leave when the film reached the point where you had begun watching. Then you would get up and leave. As a youngster I can remember doing that a number of times, before I was allowed to go to movies by myself. My mother had the tendency to think that if the show started at 5 that was when you left the house. Imagine being a young child and going to see Old Yeller, sitting there still crying through all the other showings to see the beginning. It was far worse than when Bambi's mother was killed by the hunters. (Hmmmm Hollywood pseudo-psychology would trace that to all my problems later in life probably as Robert Mitchum as Norman would do in The Locket.
I can recall my wife and I going to see a movie at a multiplex and deciding another film being shown there was on our list, and it was early enough, why not get tickets to both and see both of them. one thing we decided, we would never do that again. The seats in the multiplex are nothing like the seats were in the grand movie palaces that existed into the '70's in my town. The old seats so much more comfortable, but no longer available since American bottoms had spread too much. There were four big ones still in operation full time, into the '70's, and 5 others that kept trying to keep open and serve all day movies for kids, and then in the evening more adult fare. Can remember The Three Stooges in Outer Space, during the day at one, and at night Clint Eastwood's "spaghetti western" For a Fistfull of Dollars.
Those were the days, what few Drive-In theaters were left gave you that experience in your car for awhile, but now even there, if there is one (I have one a half-hour from home) you now get a cartoon, maybe a short, and the main feature.