Home Events Greensky Bluegrass Welcomes Dan ‘Lebo’ Lebowitz At The Warfield Greensky Bluegrass Welcomes Dan ‘Lebo’ Lebowitz At The Warfield planetsixstring September 12, 2017 comments off Tweet on Twitter Share on Facebook Google+ Pinterest Michigan’s Greensky Bluegrass had a few surprises in store for the Bay Area faithful including a guest spot from a local legend.