The Shameless Old Lady (1965)

You'd better go see it as soon as you can!

Madame Bertini, a newly widowed 70-year-old miser, has lived a sheltered life in squalour. She determines to venture into the modern world and have as much fun as possible, and in doing so finds that she loves it. She blows her life savings, much to the disapproval of the young people around her.