Hard-core jazz fans can’t abide it, but the so-called “smooth jazz” has a large and growing following. “It’s supposed to be banal tripe for people too meek for real jazz. It’s the boring music played on ‘quiet storm’ radio stations or heard in the waiting rooms, lounges and elevators. It’s even the porno industry’s soundtrack. Nonetheless, smooth jazz has its champions. And its audiences are perhaps the most diverse and harmonious in all of music.”