The Cantor's Jazz Cabaret: Barbara Linn Powell & John Schott in Concert. Before she was a Cantor, Barbara Powell was a jazz singer. With long time collaborator John Schott on guitar, this intimate concert will feature jazz standards from the 1930's -70's with creative improvisation, chemistry and swing. Featuring tunes by Gershwin, Arlen, Dorough, Carmichael, Berlin among others. Her clear, soulful voice that usually fills this space with prayer, will swing it to the rafters.