You still have drive-ins in Europe?
We barely had them to begin with. I don't know about other countries, but drive-in theatres always were a rarity in Germany. I just checked Wikipedia, it says at their hayday there were about two dozens drive-ins in West Germany (60 million people), and only one in East Germany (twenty million people).
Today, there are only five drive-ins left in West Germany, but oddly they opened new ones in East Germany after the iron curtain fell, and some of them are still in use. Most people in Germany have never been to a drive-in theater and know them only from US movies. I guess the movies are the reason they became (relatively) popular in East Germany after the iron curtain fell. Everything which was percieved as typical West (meaning the Western world) or American was highly desirable back then.
So even if drive-ins are on the decline in the US, I bet you still have much, much more of them than we have.
We were lucky and had a drive-in in the next bigger city. Of course my parents never-ever would have taken their kid anywhere in the evening (what a shocking thought
). But when I was a teenager, we went on our own. I remember the bad sound of the loudspeaker you would hang into your window. And I remember making-out in the backseat more than any movie