Home Jambase Infamous Stringdusters Team With Keller Williams For Grateful Grass In Denver: AudioNational Music NewsJambaseMusicInfamous Stringdusters Team With Keller Williams For Grateful Grass In Denver: AudioOctober 31, 20161061FacebookTwitterPinterestWhatsApp Listen to the Keller Williams’ Grateful Grass set from The Infamous Stringdusters’ Big Top Halloween celebration in Denver.