First, heat 3/4 cup sugar in 1 cup of water until sugar is dissolved. Then add your sweet syrup to about 3 cups club soda and about 2 cups fresh lemon juice (you can adjust these proportions to make it as strong or weak as you like). Add vodka if desired (about 1 1/2 oz per serving).
Serve over ice, and garnish with fresh lime rounds, strawberry slices, or even watermelon wedges.
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