Mix a fizzy, refreshing drink with tart grape juice, club soda, and vodka. Also try:Basil Lillet Slush
Place lemon and mint in the bottom of a cocktail shaker; add sugar and muddle to combine. Add grape juice and vodka. Fill shaker with ice; cover and shake to combine. Fill a rocks glass with ice. Strain into prepared rocks glass and top with club soda; garnish with concord grapes and serve immediately.