Get out a Punch Bowl or large drinks container.
If using canned, strain the Pineapple chunks. Go ahead and save it to use if the pineapple was canned in juice, but dispose of it if it's syrup (unless you like your drinks really sweet).
Put the pineapple chunks in the bowl.
Add the rum and orange liqueur. (If your hand slips, and you add a little extra, that's fine).
Add the pineapple juice. (If your pineapple was canned in juice, you will already have around 2 cups... go ahead and use it)
Put the punch bowl in the refrigerator to chill for 1 1/2 to 2 hours.
Just before serving time, add the wine and champagne.
Stir and serve.