Sweet, tropical piña coladas were popular at the legendary Trader Vic's restaurant in New York City.   Frozen Piña Colada Serves: 4 cups Ingredients 4 c. ice cubes 0.75 c. pineapple juice 0.50 c. golden rum 0.50 c. cream of coconut Instructions In blender, combine ice, juice, rum, and cream of coconut and blend until