As the Dynettes, Martha Hull, Diana Quinn and Cherie Grasso have always been as much fun to watch on stage as to hear. They inhabit their songs as they animate them, drawing mostly on a trove of girl group classics from the '60s, and dress the part as well. As fashion statements go, theirs is a brazen shout -- a triumph of sass over class. So when the sound system at the Twist and Shout club occasionally failed to do their voices justice Saturday night, no one in the sold-out house seemed to mind very much. The show was entertaining and incessantly danceable just the same.

For the most part, the sound system rendered many of the vocals thuddingly alike. Yet there were times when each member of the trio managed to break through the dense mix: Hull with a faithful and sweeping rendition of "River Deep, Mountain High"; Quinn with an infectious "Iko Iko" and "My Boyfriend's Back"; and Grasso with a delightful "Why Do Fools Fall in Love?"

In addition, songs like "Locomotion" proved to be terrific ensemble pieces, not just for the singers but also for guitarist Bill Renfrew, bassist Johnny Castle and drummer Bob Berberich.