T Bone Burnett performs in the Swan Stage during the Hardly Strictly Bluegrass at the Golden Gate Park in San Francisco, Calif., on Friday, Oct. 2, 2015. (Ray Chavez/Bay Area News Group)
Michael Franti & Spearhead perform in the Banjo Stage during the Hardly Strictly Bluegrass at the Golden Gate Park in San Francisco, Calif., on Friday, Oct. 2, 2015. (Ray Chavez/Bay Area News Group)
