robert "bobby" banas (born september 22, 1933) is an american dancer and actor. he is known for his work on movies such as "west side story" (1961), "always" (1989) and "down and out in beverly hills" (1986). he also did a televised performance of the dance (which he also choreographed) for the 1963 shirley ellis song, "nitty gritty".