In Radio Golf, the home that once belonged to Aunt Ester, a centuries-old repository of the black American experience, is to be demolished to make way for development, but itinerant worker Sterling Johnson refuses to let that happen. As played by Harvy Blanks, Johnson is one of August Wilson's garrulous holy fools. Needling, wheedling, playing the buffoon or cutting off laughter with sudden rage-filled dignity, he provided the moral center in this Denver Center Theatre Company production.