The first drive-in movie theater opened for business on June 6, 1933, in Camden, New Jersey. In the early 1960s, there were over 4,000 drive-in theatres in the U.S. Now there are less than 330.

I think there are only four in operation in Iowa. (Delmar, Newton, Blue Grass, and Spirit Lake) At one time there was over 65 drive-in theatres located across the state.

Credit: karisma50 via YouTube

credit: Edit Bay 3