It is hard to believe that most of these faded away. I loved drive-ins as a kid. We would gather friends or family, pile into car(s) and go watch the latest movie. We would get there before the show would even start, the parents would let the kids run rampant in the surrounding area where we parked. I even remember times when our parents would cheap out and sneak us in. The main drive-in we attended was the "RiMar Drive-In" it was the located at 6287 N. Orange Blossom Trail, Lockhart, FL 32810. It was a single screen that opened by Floyd Theatres in 1961. The car capacity was listed at 300. There was never that many cars there but it would get very crowded at times. There were other drive-ins around town but this was the closest one to us.
An actual Rimar Flyer:
This is a speaker that you attached to your car widow:
This is the screeen:
The last two photos are not from the Rimar Drive-In, just samples..