Other than golf, my other hobby is also music. I sing in a couple professional choir groups (large and small chamber).
This is actually the most rewarding. It has brought me in contact with people like Dave Brubeck, The Kings Singers, and Peter Schickele (PDQ Bach and Schickele Mix on NPR).
We are performing for the third time with Dave Brubeck in Baltimore this coming March. We made a recording with Dave last year (not out yet).