1 c. sugar
1 c. water
1 1/2 c. lemon juice
1 1/2 c. grapefruit juice
5 c. orange juice
6 c. unsweetened pineapple juice
1 fifth dark rum

Make a sugar syrup by boiling the sugar with water for 5 minutes. Let cool. Mix together with all other ingredients and let mellow for 1 hour. Pour over a large block of ice in a punch bowl and serve chilled.