Virgin Mai Tai

No cooking required; total time about 5 minutes. To batch: combine non-alcoholic rum, orange, pineapple and lime juices and orgeat in a pitcher, chill, then add crushed ice just before serving and pour into glasses, with shots of non-alcoholic dark rum for floating. Substitutions: instead of non-alcoholic rum, use about ½ teaspoon apple cider vinegar or 1 oz (30 ml) extra pineapple juice; instead of orgeat, use a drop or two of almond extract or a splash of almond-flavored coffee syrup.