A fiddle skitters and swoops over a sharp, pulsing beat as meat-and-potatoes accordion pushes people out of their seats. Over the past 35 years, BeauSoleil has helped define Cajun music with a couple dozen albums, about a dozen Grammy nominations and a few wins, too. The band's most recent release, 2009's Alligator Purse, continues the band's tradition of welcoming disparate musical influences from jazz and zydeco to the further afield rock and bluegrass. Even with these influences, the lyrics are more likely than not to be in Cajun French, delivered by leader and fiddler Michael Doucet in an Acadian, sing-song holler. Slower waltzes epitomize true longing, and up-tempo numbers reel with the breathless excitement of a dance hall. Fortunately, the floor will be open to anyone inspired to move. 8:30 p.m., with dance lessons at 8 p.m. —Andrew Ritchey