1/2 oz of creme de cassis (or blackcurrant-flavored liqueur)
3 oz of grapefruit juice
1 tsp of grenadine syrup
1 1/2 oz of campari bitters
1 oz of Pineapple Juice
Pour all ingredients into a cocktail shaker half-filled with ice cubes. Shake, strain into an old-fashioned glass almost filled with crushed ice, and serve.