Getting their groove on by flashing peace signs and sporting tie-dyed tee-shirts, visitors to the Levitt Pavilion on Sunday evening came dressed appropriately for the "Sixties Show" opener of the outdoor venue's summer-long season of free entertainment.

This year, the Levitt plans a slate of more than 50 free shows, ranging from Grammy Award-winning headliners to regional acts and emerging performers.

"This is our 39th annual summer," said Freda Welsh, the Levitt's executive director, as she handed out the season's schedules to Sunday's concert goers. "Tonight we've got great weather, a great crowd and a great show, with all musical favorites from the '60s, from the Beatles to CSNY (Crosby Stills Nash and Young)."

Besides crowd-pleasing tunes like "Good Vibrations," "Can't Explain," "In the Summertime," "A Hard Day's Night" and "Blackbird," the music was interspersed with sound bites from the era's television programs, such as "The Andy Griffith Show" and "The Ed Sullivan Show" as well as commercials and news reports.

It was a trip down memory lane for many in the audience and an introduction to the remarkable decade for others, as families and friends mingled, enjoying pre-concert picnics of food and beverages. Many, on the first note of a popular song, rushed the stage to dance -- barefoot and carefree, a mature rendition of the youthful vibe at the Woodstock Music Festival in 1969.

"We just came out to have fun, have a girls' night out and listen to some good music," said Alayne Murphy, sitting with friends Helen Garrity, Colleen Bushby and Carol Prieston.

Nearby, Westporter Athena Bradley, sitting with her husband Hugh and others, remarked, "I discovered this series in 1998. To come to an event like this and share it with your friends is priceless. I'm originally from Larchmont and we had nothing like this there."

Among the younger set, Michael Wolfe, with his wife Karen and another couple, Michelle and Rich Rosier, said, "Since we were born in the '60s, we feel like we belong here. We missed Woodstock. This is the closest we could get."

For more information about the Levitt Pavilion for the Performing Arts and this season's schedule of concerts, visit www.LevittPavilion.com