Tom Hanks and his Saving Mr. Banks co-stars are set to stage a sing-a-long of Disney tunes at California's the Polo Lounge on Friday (08Nov13) to celebrate the upcoming release of the Mary Poppins back story. Oscar-winning songwriter Richard M. Sherman will play the piano as 150 guests join in the bash to sing Poppins classics like Chim Chim Cher-ee, according to the New York Post.