This is the old Drive in where the x-rated films were played. i was too young then, but remember people talking about it. Not far from where i grew up.

Blue Sky Drive-In

I remember the protests related to the content of the movies played here in the late 1970's

Blue Sky Drive-In Theater, across from 4729 W Kinde Road, about 5 miles southeast of Caseville, Michigan. Nothing remains of this today, but evidence of it can still be seen on satellite imagery.