Irving Plaza's current show is Song of Singapore which began performances on 5/7/1991.
What were the longest running shows at Irving Plaza?
Song of Singapore which ran from 5/7/1991 to 5/7/1991, Oedipus Rex which ran from 8/21/1911 to , Hamlet which ran from 8/24/1911 to , Macbeth which ran from 8/24/1911 to and The Merchant of Venice which ran from 8/24/1911 to ,