As you enter the Professor Longhair exhibit, formally called “Me Got Fiyo: The Professor Longhair Centennial,” on the second floor of the Old U.S. Mint, a bust of the iconic pianist, vocalist and composer greets you. For those who’ve frequented Tipitina’s, the club established for Fess and named for one of his most memorable songs, it’s a little startling. “Oh, wow,” one might initially think. “Who’s at Tip’s to welcome folks there?” Very soon it becomes appare...