Vancouver Yippie Bob Sarti's play "Yippies in Love", premiered in June 2011. The Yippies refused, so the City felt justified in denying Yippie their permits. Aron "The Pieman" Kay became the best-known Yippie pie-thrower. Cleaver personally preferred Yippie leader Jerry Rubin. Aron Kay, also a Yippie, went on to take up Forcade's pieing tactics. The annual July 4 Yippie smoke-in in Washington, D.C., became a counterculture tradition. Author and Yippie Dana Beal co-wrote the 1997 book "The Ibogaine Story". The term "Yippie" was invented by Krassner and Hoffman on New Year's Eve 1967. Yippie theatrics culminated at the 1968 Democratic National Convention in Chicago. Hoffman helped her husband plan some of the most memorable pranks of the Yippie movement. She was briefly associated with the Yippie movement. In Summer 2013, The Yippie Cafe officially closed. "Yippie Kayak" received critical acclaim from critics. Over the next week, the Youth International Party (known as Yippie) took shape. A Yippie flag was frequently seen at anti-war demonstrations.