To appreciate the magic of a performance from Thee Sinseers, you have to understand the co-mingling of Chicano and African American communities in post-World War II, Southern California. Living in the same neighborhoods, these communities created a virtual symphony of R&B, mariachi and boleros. And what you hear in this California band's Tiny Desk (home) concert, as they perform among plants in a flower shop, builds on a legacy of music that became known as "oldies but goodies" in the Chicano community.