It's the 60's golden age of pop & the California sound featured at DCA.
Thank you! The Beach Boys had their first hit song in 1962, and the bulk of their most popular music dates from 1963-67. I've also heard that DCA band cover songs by Jan & Dean, The Surfaris or The Hondells, and those additional songs were all from the 1963-65 timeframe.
Nothing performed by any surf band in DCA is from the "1950's". There were no nationally popular songs by surf bands in the 1950's, so there is no repertoire of recognizeable songs from that decade to pull from anyway.