Tank and the Bangas call their rehearsal space and its cozy lower Ninth Ward confines “Bangaville.”

The band meets twice a week, from 10 p.m. to midnight on Tuesday and Wednesday nights, to rehearse in their low-ceilinged space—which members also jokingly refer to as the Bangas’ “museum.” Its compact walls are adorned with various magazine clippings and awards they have gar...