Special equipment: A 60-ounce pitcher
Garnish: 2 limes, cut into wedges
In a blender, combine the pineapple, rum, agave nectar, and lime juice. Blend until the pineapple is almost pureed. Pour the pineapple mixture into a large pitcher. Add the ice and stir. Slowly pour in the ginger ale.
Pour the cocktail into glasses and garnish with lime wedges.