She was believed to be the last person always be who knew Al Capone. Her father was an enforcer.
She also opened at the Flamingo Hotel & Casino in 1947 for Bugsy Siegel when the Hotel opened originally. She said her first check from there bounced and Siegel personally wrote her a check for her pay.
After the Dick van Dyke show days, she would sometimes show up (walk on) on the tonight show with Peter Lawford. I wonder if they were dating but the Lawford bios do not mention her as one of his interests. Lawford was well past his prime in those days and on a downward spiral with his alcohol and drug abuse. But Rose Marie had a long, long, life.