St. Germain, the elderflower liqueur handcrafted by French stereotypes and favored by your aunt who spent that summer in Nice, was a sponsor of the event and they're kind enough to share two recipes: one is an effervescent cocktail with champagne or sparkling wine, and the other is a version of a white sangria.
The St. Germain Cocktail
2 parts Brut Champagne or Dry Sparkling Wine
1½ parts St-Germain
2 parts Club Soda
Method: Stir ingredients in a tall ice-filled Collins glass, mixing completely. Think of Paris circa 1947. Garnish with a lemon twist.
1 bottle Sauvignon Blanc or Dry White Wine
1 cup St-Germain
2 Fresh Peaches
5-6 Fresh Strawberries
6 Fresh Raspberries
1 bunch Fresh Grapes
Method: Stir ingredients in a pitcher or carafe. Soak for approximately 15 minutes (or longer if desired). Serve in an ice-filled glass, then telephone your physician and regale him with stories of your exemplary fruit consumption.
If these don't strike your fancy, here are Six Cocktails You Must (!) Try Before Summer Ends.