Spooky Citrus Punch

I served this drink at my Pampered Chef party. By the end of the event, there wasn't a drop left. It was so good! It says the sugar is optional, so I made it without. After a quick taste test, I decided it was too tart and added the sugar. That made it much better.

Spooky Citrus Punch
1 can (12 oz.) frozen limeade concentrate, thawed
3/4 cup lemonade concentrate
2 cups water
1/4 cup sugar, optional
2 liters ginger ale, chilled
Food coloring of your choice, optional
ice cubes
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In a large punch bowl, combine the limeade and lemonade concentrates. Stir in water and sugar if desired. Stir in the ginger ale and food coloring if desired. Serve immediately over ice.