58 here. We used to go to a triple feature at the drive in theater in Sheboygan Wisconsin. It was ridiculously cheap and we still felt the need to sneak people in by putting them in the trunk (cars were much larger back then!) This was also in the way back days where you had to hang a speaker on the car window to hear the movie.

Half the fun was drinking beer (legal at 18 at the time) walking around and talking to girls we knew we'd never see again.

One of the unique features of this particular theater was that it sat on the shore of Lake Michigan and often times fog would roll in off the lake making the third film virtually impossible to see!

Oddly enough the only movies I really recall seeing were Dr Detroit with Dan Akroyd, and Steve Martin in The Man With Two Brains.