The show: "I'm Assuming You Know David Greenspan" by Mona Pirnot at the Atlantic Theater Company. What makes it special?: David Greenspan. Who is he and why is he in a title of a play that he did not write?: Greenspan is a downtown theatre artist " writer/performer/sui generis" who has earned a half-dozen Obie Awards over a career that has spanned more than 40 years. …
