George, this was at the bottom of the obit link I posted:

In later years, she astounded audiences in New York, Las Vegas and on the road with her dynamic tapping in Sugar Babies when she was in her 60s. In 1990, she commented that Sugar Babies had made her financially independent.

Before each performance (including 1,700 on Broadway), she practiced for an hour.

"Honestly, I have had to live like a high priestess in this show," she remarked in a 1984 interview. "It is a very, very lonely life. When you work the way I work -- that means hard -- there's no time for play."

I can believe it.

SRS