The HBO series “Boardwalk Empire” is all about Prohibition era gangsters in Atlantic City , New Jersey. It is a wonderful series with great characters and a lively and authentic musical score based on that 1920’s flapper style music. Martha Wainwright sings this song “All by Myself.” She is a 35 year old Canadian-American folk singer who seems an unlikely choice for the song, but she does a fine job with an old composition (1921 by Irving Berlin). —Paul