522-north-pinckney-cocktail-51160710
[‘2 cups fresh pink grapefruit juice (from 2-3 grapefruits)’, ‘1/2 cup St-Germain (elderflower liqueur)’, ‘1/4 cup Campari’, ‘1 750-milliliter bottle chilled sparkling wine’]
Combine grapefruit juice, St-Germain, and Campari in a large pitcher. Cover and chill until cold, about 2 hours.
Divide grapefruit mixture among glasses and top off with sparkling wine.
DO AHEAD: Grapefruit mixture can be made 1 day ahead. Keep chilled.