The Onion Cellar is a play that premiered at Zero Arrow Theatre (a venue used by the American Repertory Theatre), in Cambridge, Massachusetts from December 9, 2006 to January 13, 2007. It is a cross between a musical, cabaret show, rock concert and drama. It was the brain child of Amanda Palmer who based the title of the production on a chapter from Gunter Grass's The Tin Drum. In the novel, The Onion Cellar is a bar in post-war Germany where people go to share painful memories and cry. While drinking and talking, the clients peel onions, both to make crying easier and to lessen the shame for those afraid to express their feelings openly.