by Al Campbell Alligator Bogaloo is one example of Lou Donaldson's successful combinations of hard bop and soul-jazz. Of the six tunes, three are Donaldson originals, including the title hit. The excellent band, consisting of Melvin Lastin,on cornet,George Benson on guitar,Lonnie Smith on organ, and Leo Morris on drums, mixes laid-back vamps beneath driving hard bop charts. As the '60s turned into the '70s, Donaldson began shaving off hard bop invention for a more radio-friendly and 45 rpm length, leaving soulful -- yet monotonous -- vamping.