The father of cosmic American music, Gram Parsons was the most influential country rocker of his generation. His pioneering late ’60s and early ’70s work with the International Submarine Band, the Byrds, the Flying Burrito Brothers and his solo albums (his 1973 debut, “GP,” and the 1974 release, “Grievous Angel,” following his early overdose death) set the standard by which all others in the country-rock genre will forever be judged. On Saturday, Oct. 3, local Graham devotees Andy Vaughan and the Driveline, Jay Turner and the Burrito Riders League pay tribute to the late great Floridian singer and songwriter and multi-instrumentalist at Max’s Positive Vibe Café for Gram Fest 2. The show runs 6-10:30 p.m. Admission is $5 with proceeds benefitting the Positive Vibe Foundation. positiveviberva.com.