Sparkling Grapefruit Cocktails

Ingredients

• 1/2 cup granulated sugar
• 1 cup water
• 1 teaspoon rosemary leaves
• grapefruit A handful of peeled, ~1 tablespoon
• 1 sprig rosemary
• 2 ounces vodka
• 1/4 cup grapefruit juice freshly squeezed
• 4 ice cubes
• 2 ounces syrup simple rosemary, more to taste
• 1 cup sparkling water
• 1/2 cup granulated sugar
• 1 cup water
• 1 teaspoon ginger freshly sliced
• 2 ounces bourbon
• 2 orange slices blood
• 3 slices fresh ginger
• 1/2 cup grapefruit juice freshly squeezed
• 1/4 cup blood orange juice freshly squeezed
• 2 tablespoons ginger syrup simple, or to taste
• 4 ice cubes
• sparkling water to top