1. Stir together lemonade concentrate and cranberry juice cocktail in a large pitcher. Cover and chill at least 1 hour or up to 24 hours. Stir in club soda just before serving. Garnish, if desired.
Champagne Punch: Substitute 1 (750-milliliter) bottle extra-dry Champagne or sparkling wine and 1/4 cup orange liqueur for club soda; proceed with recipe as directed.
Note: For testing purposes only, we used Cointreau for orange liqueur.