Exudes Exuberance. Philanthropist. Friend of the Arts (and Singer).     When Nancy Kranzberg walks into a room, her laughter is her calling card. The 73-year-old philanthropist is as well-known for her warmth as for her generosity.     But to get a front-row look at her unbounded joy, watch her belt out “St. Louis Woman” on stage at a fundraiser. She and Ken, her husband of 49 years, are unbridled cheerleaders for the arts. The couple … Continue reading Take It from Me: Nancy Kranzberg