Robert Mugge's Rhythm 'N' Bayous is exactly what the the full title claims: a "road map" to the wide variety of musical genres born, or at least bred, in the four corners of America's most musical state: that is, the jazz, blues, R&B, gospel, country, rockabilly, Cajun, Creole, zydeco, swamp pop, and more that have emerged from the bars, churches, bayous, and neighborhoods of Louisiana.