Based on a humorous book from 1952, “How to Succeed in Business Without Really Trying” will entertain theatergoers for the next two weekends in Clarkesville. The winner of a Pulitzer Prize award in drama centers on a young window cleaner, J. Pierrepont Finch, who begins a meteoric rise at the World-Wide Wicket Company. He starts in the mailroom and works his way to the top, ultimately ending up a vice president of advertising.