In 1945 my grandmother Margaret was stationed in Washington, serving her term in the Air Force (for Canada.) She was one of 26 Canadian joint staff to be invited to attend an annual Roosevelt Ball that raised money for a charity dedicated to Polio research. They were expected to attend in full uniform, and it probably helped their cause a little with the celebrity guests while waiting for their dance cards to fill up.
While she can’t remember the names of all of the guests in attendance, she does remember Gene Kelly, Caesar Romero, Van Johnson, Diana Lynn and Margaret O’Brien. She danced with both Gene Kelly and Caesar Romera. She doesn’t have any photos from the event (silly pre-digital age), but I managed to track this photo down from the evening on one of the American history sites:
If folks track down more photos or can point me in the direction of a place where photos might exist, please do email me. I’d be interested to see them.