In a big bowl, add gin, dark rum, vodka, light rum, grenadine, pineapple juice, and orange juice and stir
2.5 ounces gin, 1.5 ounces dark rum, 2.5 ounces white rum, 2.5 ounces vodka, 2.5 ounces Grenadine, 6 ounces pineapple juice, 10.5 ounces orange juice