A few years ago, I went to a 4-screen AMC CLASSIC theater in Big Rapids just outside my hometown of Grand Rapids, Michigan. I saw Disney/Pixar's Planes Fire & Rescue and Universal's Despicable Me 3 there. It permanently closed on 8/21/2020 because of coronavirus.
Noticed a little different from AMC Classic Theatres. Unlike AMC and AMC Dine-In Theatres, where the graphic shows Don't Ruin the Movie graphic in between AMC Stubs and Enjoy the Show. In AMC Classic Theatres, there's no Don't Ruin the Movie graphic.
the "don't ruin the movie" portion was there before 2020, then it was added back recently into the 100th anniversary feature presentation source: I went back to my AMC classic recently