Once upon a time (in 1988 to be exact) a Frenchman named François Pasquier returned to Paris after a period of living abroad. He wanted to celebrate his birthday with friends he hadn't seen while away but didn't have enough room at his place. So he decided to organise a picnic in the Bois de Boulogne instead. Not your average picnic of course, this one had chairs and tables and a proper meal (as the French seem to do, take something normal and Frenchify it into something chic..!).
Back in the day, before the introduction of widespread mobile phone use, the group opted to dress in white in order to spot each other more easily in the Bois de Boulogne (the Boulogne Woods). Little did they know that in doing so, they would be giving birth to a future worldwide phenomenon and the largest 'impromptu' dinner party ever known to exist.