Crosby, Stills and Nash played its second of sold out show at the Greek Theater in Los Angeles last night (Oct. 4) as part of an extension of the band’s “Three Together” tour, playing new material as well as some of the classics that defined ’60s and ’70s rock music. The band, David Crosby, Steven Stills and Graham Nash, also helped define the ’60s-era counter-culture with songs like “Wooden Ships,” “Ohio,” and “Woodstock.” The trio, noted for their three-part harmonies played together for the first time at the legendary Woodstock Music and Arts Festival. Before that however, each had established themselves in ’60s-era supergroups....