Step 1.
- In a large bowl or pitcher, combine the rum, pineapple juice, and orange juice.
Step 2.
- Stir well to mix the ingredients together.
Step 3.
- Add the grenadine syrup for sweetness and color, and stir again.
Step 4.
- Fill serving glasses with ice and pour the punch over the ice.
Step 5.
- Garnish each glass with a slice of pineapple and a maraschino cherry.