Robert Křesťan a Druhá tráva: Concert celebrating the 20th anniversary of the band Druhá tráva at the Stará Střelnice club. The entire concert can be seen as a cross-section of Druhá tráva's 20-year career mixed with their current work. A big bonus of the Druhá tráva concert is the participation of American legend Peter Rowan, who will be performing as a guest. Peter Rowan is a songwriter, guitarist, and singer, a world legend of country, bluegrass, Tex Mex, and many other styles, which he loves to combine. This musician is one of the legends of the 1960s, having played with Cherry Garcia and others.