522 North Pinckney Cocktail | view more Recipe
'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.