I'm using gin, but silver rum or vodka would be just as good. Feel free to use the white, pink, or red varieties of grapefruit; color and sweetness of each will vary. I use fresh Bing cherries when in season, but you can opt for regular jarred red cherries. If you prefer your cocktail less sweet and more tart, leave out the simple syrup. The basil is more than just a visual garnish, you will love the fragrance it brings to this cocktail.