Last night at Rock ‘N’ Bowl, Nathan and the Zydeco Cha Chas knocked ’em out with his mix of English and French, waltzes and two steps, blues and zydeco.  And the divided crowd danced and rocked while the New Orleans Saints lost to the Atlanta Falcons.  Nathan was in fine form with his piano-key Hohner accordion and his long-time band: drums, five-string bass, guitar and rubboard (also called a frottoit or scrubboard).   About 80 minutes into his set, Nathan casually strolled through the audience and dancers, stopping in front of various music lovers, including yours truly!  His big announcement of the evening was that his new album will be out “by the end of the year.”  That’s great news, adding to his catalog: Steady rock, Your mama don’t know, Follow me chicken, Creole crossroads (with Michael Doucet), and I’m a zydeco hog : live at the Rock’n’ Bowl, New Orleans.  Nathan Williams is a living link to the classic zydeco era, learning from Clifton Chenier and comparable to Boozoo Chavis, Rockin’ Dopsie and Buckwheat Zydeco.  And he’s an educator, too, appearing recently to Lafayette-area high schoolers to discuss zydeco with Dr. Mark DeWitt, holder of the Dr. Tommy Comeaux Memorial Eminent Scholar Endowed Chair in Traditional Music at the University of Louisiana at Lafayette.