Recuperation journey: Feeling sentimental

This classic photo sums up why I have grown so fond of old black and white movies from the '40s. It was my mother's era and she's in this photo, standing in the back row. 

I'd love to know where and when the photo was taken. 

We found the photo among her things. I wish I had seen it before she passed; she could have told me what it was all about!