Pineapple Party Punch

1 can (48oz) pineapple juice
3 cup cranberry juice, chilled
1 qt ginger ale, chilled
A little lemon juice
1 cup light rum or vodka (if desired)

Combine pineapple juice, cranberry juice and lemon juice in punch bowl.  Add ginger ale
and ice ring just before serving.  (Ice ring may be made with strawberries and/or
mint leaves if desired.)