In a medium sauce pan, add sugar, water, and the lemon zest. Heat over medium heat until sugar is dissolved. Simmer for 10 minutes, remove from heat and allow it to cool. Remove zest from the simple syrup and then add the 1 cup of lemon juice. Let cool and refrigerate.
To serve individual glass with the two layers: Add 2 oz. lemon syrup and 1 oz. of bourbon to a mason jar. Add 2 skull ice cubes. Now add 2 oz. red wine by slowly pouring it over the back of a spoon to layer the red wine over the lemonade layer. Top with an additional skull ice cube and then serve.
To serve a crowd, make a pitcher of Demonade: Add the 3 cups of the lemon syrup, 1½ cups bourbon, and the 3 cups red wine into pitcher. Add lots of skull ice cubes and stir to combine. Garnish with lemons. Serve.
Kid-Friendly version: (Substitute grape juice for the red wine, omit bourbon and add a splash of club soda for a little bubbly) Add 2 oz. concentrated lemonade and ice into a mason jar. Add lemon zest soaked in grape juice and now add 2 oz. of grape juice and a splash of club soda.