SMOOTH Jazz singers, Torben Rees and Sara Mitra will be at The Elm Tree in Cambridge next week. The venue is building a reputation for great music, and entry is free. Torben Rees begins a residency at the venue with his quintet at The Elm on Tuesday. The following day, (Wednesday) Sara Mitra will be there. INFORMATION: The Elm Tree is on the corner of Elm Street and Eden Street. Music starts at 9pm. Torben Rees is also at The Elm on October 10 and October 24.