At the very peak of the Hippie movement, here comes Sha Na Na to remind everyone that “Rock n’ Roll is Here to Stay.” They were the second to last performers at Woodstock, opening for their friend (and fan of the band) Jimi Hendrix.

After that prime slot, the band went on to high-profile gigs at the Fillmore, best-selling albums, and even a hit TV show in the mid-Seventies. Sha Na Na ushered in a rock revival that continued with the films American Graffiti, Grease (which they were featured in), and the long-running TV show Happy Days.

20 years after their Woodstock performance, Sha Na Na, along with other performers of the original festival, gathered in California for a reunion concert. For the first time, that historic event has been put on DVD as Sha Na Na’s Woodstock: 20 Years After from Liberation Hall. It’s also available on CD and download.

We talk with founding member, drummer & vocalist, Jocko, from the the band. He walks us through the crazy path Sha Na Na took from college vocal group to the Woodstock stage in just a few short months. He also gives his memories of that crazy festival, and the reunion concert that followed.