Next time someone voices the opinion that blues music is simply too depressing to embrace, expose them to a heady dose of Roosevelt Sykes. There was absolutely nothing downbeat about this effervescent pianist, whose lengthy career spanned the pre-war and postwar eras. Sykes' romping boogies and hilariously risqué lyrics on songs like "Dirty Mother for You," "Ice Cream Freezer," and "Peeping Tom" characterize his monumental contributions to the blues idiom. He was a pioneering piano pounder responsible for the seminal pieces "44 Blues," "Driving Wheel," and "Night Time Is the R...