And if the idea of seeing dancing dervishes spinning madly to old time, high lonesome bluegrass sounds of fiddle, banjo, mandolin, bass and guitar played in unison seems unlikely to you, then think again. Deadgrass inspires music fans to get up and break out their best improvisatory dance steps, with various shimmies, shakes and spins included. This I witnessed in June at the Great Hudson River Revival a.k.a. the Clearwater Festival in Croton-on-Hudson, where Deadgrass played a set.