STONER MUSIC—Throughout the early ’70s, Steely Dan found the perfect easy-going vibe for a paradoxical era, a confusing yet oddly laidback time. Forty years later, the band still smoothly blends urban funkiness with crunchy guitar chords, smooth jazz piano and languid cymbals with no-nonsense, street talking storytelling lyrics. (And, little bit of trivia: Band’s first drummer? Chevy Chase!)