The Iguanas’ two-decade road may not exactly have driven them from sin to sin, but it’s taken them all over the map, both figuratively and literally. While bassist René Coman is the only member of the band who is a native of the Crescent City, a languid swampiness so deeply suffuses their sound that you can almost smell the peanut shells on the floor. But there’s far more depth to it than the N’Awlins patina that rests, sometimes lightly, sometimes heavily, on anything the city touches. It’s almost as if the Iguanas dragged sand up from Juarez and mud from the Mississippi Delta, threw them both into the white-hot crucible of rock, and built their foundation from there, with Sax man Joe Cabral and drummer Doug Garrison anchoring their sound deep in the groove.