Ok ya got me started here.
When I was in high school drive-ins were where we'd be on a Fri. or Sat. nite.
Me and about 3 or 4 other friends.
When they chraged per person someone (or 2) would always hide in the trunk. Eventually they charged by the car instead.
Monster movies were the big thing back then. And westerns.
Then, when I graduated and got my own car and started dating, mmmmm.
Because drive-ins were passion pits. It was a safe place for teens to go and neck.
To keep patrons from getting carried away, the drive-ins in my area hired a guy or two who would walk patrols through the lot, wearing long white coats.
I didn't go much when I was married, but about the time I got divorced vans started getting real popular. So I bought one, fixed it up inside with cabinets and a bed and buddy I was in business.
Vans were relegated to the last few rows in the drive-in (because of their size). We parked backwards and opened the rear doors.
The had abandoned the white coat patrols by then, so anything went.
And besides sex there's a lot of other stuff you could do that you can't do at (most) walk-ins.
Like drinking beer, smoking pot, being naked and talking.
-The sound system sucked.
-The food from the snack bar was atrocious.