..A lot of the time, we'd go to the drive in with large groups, i.e. 15-20 people, families, kids..etc. Back in the day, it was $5-$7 per car load, around $10 for a double feature, so it saved a lot of money. Vans were a big deal back then, so you could fit a bunch of people in them.
..There was a playground up front where all the kids went while the adults socialized. When the lights dimmed, there was a catchy little song that encouraged you to buy popcorn. When it came on, all the little kids scurried back to their cars. They then played a cartoon feature before the movie started.
..Everyone brought something, kind of like a potluck. The one we went to also had grills near the backrow so you could bring food and grill out on it. It was like a big picnic at night or maybe a tailgate before a sporting event. It was much more than just you watching a movie.
..Warm summer nights, under the stars, a cool breeze blowing through..all while watching a movie from the top of my dad's van with my brothers and my friends. Good memories.
...Note that this was prior to VCR's becoming a common household thing.