From its splendid art deco exterior to its handsome and spacious screening area, this theater has long been the class of local film houses. But for how much longer? Even as we speak, the Twin Cities' last remaining movie house of decent size is being scheduled for vivisection, its balcony slated to be split in two for the purpose of adding another pair of screens to Landmark Theatres' local roster. All reports peg this plan as a done deal, pending the parent company's ability to solve what the City Council sees as a potential parking problem. Nevertheless, consider this award as a call to arms. After the recent demise of the Skyway Theater and the imminent fall of the Suburban World, Twin Cities movie lovers might refuse to stand for the loss of another local film landmark.