I used to go to the Prix de Diane with my parents, aunts and uncles when I was a child !!! And I loved it !!
Besides the race, and the "Hats défilé", there was an Election of the most elegant "Equipage"
=> a jury chose the most elegant family for a picnic (including car and dogs, plates etc ) and we won when I was 9 or 10 I think...
From Paris - how exciting!! Sounds like a marvellous day Gina - I hope you can go and tell us all about it!