Information for The Rat Pack - At Christmas at The Mill, Sonning (Concert). Tribute act: Frank Sinatra, Dean Martin and Sammy Davis Jnr. We are pleased to announce the return of The Rat Pack at Christmas. Featuring the internationally-renowned Manhattan Swing Orchestra and one of Dean Martin's sensational Gold diggers, The Definitive Rat Pack brings you an evening of festive classics including: White Christmas, Jingle Bells, The Christmas Song and Let It Snow, plus all- time favourites including I've Got You Under My Skin, That's Amore, Mr Bojangles and New York, New York.