Stir together first 3 ingredients in a pitcher. Fill 8 glasses with ice cubes, filling three-quarters full. Pour vodka mixture evenly over ice. Spoon 2 teaspoons cherry juice into each glass (do not stir). Garnish, if desired, and serve immediately.
Tip: Buy a carton or bottle of orange juice labeled "not from concentrate" for the best flavor. Serve bottled water and iced tea as nonalcoholic options.