This week's musical events include an American Roots series concert by Ray Wylie Hubbard, jazz saxophonist Greg Abate at The Greenwich, and a cd release party with Dan Karlsberg at Caffe Vivace. Ray Wylie Hubbard will be on Memorial Hall's stage with Arlo McKinley Thursday, October 4th. Greg Abate will be performing with a local all-star band at The Greenwich Saturday night, October 6th. And, jazz pianist Dan Karlsberg will have a cd release party at Caffe Vivace Sunday afternoon, October 7th,