Step 1

In a small pitcher, combine the lime juice, lemon juice and sugar. Stir until the sugar is dissolved.

Step 2

This step is optional to create a salt-rimmed glasses. Moisten the rims of two margarita or cocktail glasses with lime wedges, reserving the wedges for garnish. Sprinkle salt on a plate. Dip the rims of the glasses in the salt. Editor's Tip: Spice up the rim by adding Tajin seasoning to the salt.

Step 3

Divide the crushed ice among the prepared glasses. Pour the lemon-lime mixture over the crushed ice. Top off each glass with 2 tablespoons club soda and the reserved lime wedges.