Home Current Greensky Bluegrass Welcomes Marcus King For Gregg Allman Tribute At Rooster WalkWorld NewsCurrentNewsGreensky Bluegrass Welcomes Marcus King For Gregg Allman Tribute At Rooster WalkMay 30, 2017146FacebookTwitterPinterestWhatsApp Listen to Saturday night’s Greensky Bluegrass set including a pair of guest spots and a tribute to Gregg Allman.