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The Louisiana zydeco scene has long been a family affair. Parents introduce their children to music-making as soon as the kids are able to walk. The latest exponent of this tradition is accordionist J.J. Caillier. Caillier is the son of J.J. Caillier Sr., who hosted a zydeco radio show and produced noteworthy releases by bayou legends Boozoo Chavis and Clifton Chenier. The younger Caillier, after a brief period singing R&B and Top 40 hits in bar bands, put together J.J. Caillier & the Zydeco Knockouts. The band released On the Way to the Top last year. While clearly inspired by the funky approach of Beau Jocque, the disc’s hip-shaking style utilizes lighter grooves and smoother vocals on both originals and covers of songs like Van Morrison’s “Brown-Eyed Girl.” Caillier performs at 9 p.m. (a beginning zydeco-dancing lesson starts at 8 p.m.) at Glen Echo Park’s Spanish Ballroom, 7300 MacArthur Blvd., Glen Echo. $10. (301) 340-9732. (Steve Kiviat)