1. Force raspberries through a sieve to remove the seeds.
2. Combine sugar and water in saucepan. Bring to a boil and boil until sugar is dissolved to make a simple syrup.
2. Combine orange juice, raspberries, pineapple juice, grapefruit juice and simple syrup. Chill. When ready to serve, add soda water and ginger ale. (Serves 100.)