Pink and Other shades of Love

A Shadow of two people dancing as a crooner sings a song professing his love for his lady. They are slow dancing on a roof somewhere and the shadow is being cast by a full moon over New York City. The crooner is coming out of a small radio and the couple are each from France. They had arrived in New York ten years earlier, separately, with different spouses, to escape the Germans who were now marching through Paris, but who back then, were just knocking on the doors of France  - all set to break them down if not opened.