On Mardi Gras Mambo, Latin dance band ¡Cubanismo! joins John Boutte and top-shelf Crescent City musicians to create a totally authentic, Havana-New Orleans, second line revue.

In John Boutté’s French Quarter courtyard behind the Voodoo Spiritual Center and Gift Shop on Rampart Street, the outstretched arms of a sinuous and regally tall oak provide the perfect canopy for a sundry collection of walls, outbuildings and subtropical gardens. It’s a settin...