Liza Minnelli is not only the second generation of her family in show business, she is now the second generation Minnelli whose career has become associated with New York's Radio City Music Hall.

Liza with a Z made her debut at the legendary entertainment palace Tuesday in an all-new extravaganza, "Stepping Out at Radio City," that will run through May 12, probably without an unsold seat.Minnelli's father, the late Hollywood director Vincente Minnelli, began his career at the theater in 1932 as a designer.

She gives her audience a two-act show, the first half of which is an absolutely delightful solo performance of mostly new material and the second is more of a vaudeville act that gets out of hand.