On Friday an eclectic mix of musicians celebrated Bill Grahams birthday at San Franciscos Fillmore Auditorium. The night featured a number of duets, some more expected than others, including singer Linda Ronstadt and her hit making partner Aaron Neville, Phil Lesh and his recent tourmate Jackie Greene, wordsmiths Ramblin’ Jack Elliott and Jackie Greene, Doors keyboardist Ray Manzarek and veteran blues-sideman Roy Rogers, longtime songwriting partners Tuck Andress and Patti Cathcart and a closing dance set by the Booker T. Jones Band. The 27-year-old Greene and the 76-year-old Ramblin’ Jack Elliott had the evenings largest age spread, but still ran through choice versions of San Francisco Bay Blues and I’ll Be You Baby Tonight. Lesh, one of the California songwriters common links, also took the stage with his friends for a version of Friend of the Devil that featured Ramblin’ Jack Elliott on leads vocals. A bit later, the bassist offered a short set with Greene that featured the young singers Ball and Chain, as well as Casey Jones and Brokedown Palace. Interestingly enough, Greene recently told the San Jose Mercury News that he originally hoped to cover the Velvet Underground and Television, but Lesh nixed his idea to pay tribute to the seminal garage-rock bands.