The four-member group—they actually are sisters—opens this LP with a rolling, rousing He’s the Greatest Dancer. Thereafter it’s all downhill. They’ve sung back-up, performed at the Ali-Fore-man fight in Zaire and cut one previous album on their own, but this was produced by Bernard Edwards and Nile Rodgers, the driving force of the current pet disco group, Chic. The unfortunate result is that the sisters become virtually indistinguishable from their mentors. (Even a music magazine chart miscredited Dancer to Chic one week.) On this LP the Sledges’ ballads are dull, their disco tunes nondescript. They could be a dynamic force in their own style, but Chic they aren’t.