Doors at 7:30 p.m.; Cajun/Zydeco dance lesson with Diana Castillo at 8:00 p.m.; Show at 8:30 p.m. $10 Violinist-fiddler-composer and singer Tom ???Rigo??? Rigney???s East Bay quintet Flambeau plays traditional Cajun and zydeco two-steps and waltzes, along with low-down blues and New Orleans R&B. What sets the band apart is Rigney???s fresh musical takes on Cajun and zydeco, and other styles he lov