I remember my mom took me to this theater to see some kiddie movie before it became an adult theater, and she complained about all the litter on the floor. I was at East Detroit High 1977-80, and it was the Capri porn theater in those days, along with Stage Adult Movies in an old pizzeria building, north of Nine Mile.
A poster said that the Stage used to be on the site of Olive Garden on Gratiot, just south of 10 Mile. No, Roma Hall used to be on that site, as I remember going there multiple times for Girl Scout banquets. The Stage building as of 2016 still stands. After the porn years it was a takeout restaurant, car rental and insurance office.