Here’s a photo of the historic marker in Houston’s Frenchtown area commemorating zydeco music.  It’s long as markers go, but contains lots of information on people and places where zydeco flourished.  Clifton Chenier used to play there often, saying Lightnin’ Hopkins was his cousin.  Chris Strachwitz’ release Zydeco : The Early Years was recorded partly in Houston.   There’s still a thriving zydeco community in the Houston area, with many home-grown artists.  There’s even a couple of scholarly articles about zydeco in Houston.

Minton, John. “Creole Community and “Mass” Communication: Houston Zydeco as a Mediated Tradition.” Journal of Folklore Research 32.1 (1995): 1-19.

—. “Houston Creoles and Zydeco: The Emergence of an African American Urban Popular Style.” American Music 14.4, New Perspectives on the Blues (1996): 480-526.