Back when drive-in theaters were popular, almost everyone took in snacks and drinks even though technically it was against the rules. It was simply never enforced.
Then again, back in the 70's there was a great local popcorn shop directly across the street from one of only three theaters in town. Almost everyone going to that theater went to Del's before going to see a movie.
Back when I was little, my mom and dad would put us in our PJ's and go to the drive-in with sammiches, snacks and so on. The only exception was, we were allowed to go to the concession stand and get popcorn, in our PJ's. We weren't alone. It was a wonderful time, in a world far, far away.
Sometimes I yearn to turn the clock back to the late 50's, early 60's.