Ben Jaffe, bass and sousaphone player with the Preservation Hall Jazz Band, is not on the road as he usually is with the Preservation Hall Jazz Band. He’s in his yard, sitting on the porch on a break from homeschooling his seven-year-old daughter and doing household chores.

Jaffe is a true visionary who’s carried on and kept alive his parents’ dream of a venue to showcase New Orleans’ traditional jazz and nurt...