Greenbelt Theatre, which anchored GREENBELT CENTER. Although conceived and built as a moving picture venue, it was dedicated with an evening of live performances, on May 6, 1938.
Photo from Library of Congress / Marion Post Wolcott


The first movie shown at the new cinema was Shirley Temple's "Little Miss Broadway", which started its Greenbelt run in September 1938. At that time, an adult ticket went for 30 cents, with a children's admission costing 15.   
Graphic from Wikipedia / "MovieMadness"