In a town full of traditional music from jazz to blues to Cajun to rhythm and blues, the New Orleans Klezmer All Stars are an anomaly. First of all, very few people know what a klezmer is. According to guitarist Jonathan Freilich, a klezmer originally meant a “vessel of song,” and then came to mean the Yiddish music in Eastern Europe. It also took a derogatory tone. If someone was called a klezmer back in the early days, it meant that they were untrained and could only play the Yiddish repert...