2 bottles ginger ale, chilled, 32-ounces each
6 cups pineapple or orange juice, chilled
1 (6 ounce) can frozen lemonade concentrate, thawed
1 orange, thinly sliced for garnish (optional)
1 lime, thinly sliced, for garnish (optional)
Combine all ingredients in a large punch bowl or two large pitchers.