Nothing says “party” like a festive punch, and if you're throwing one of your own, this is the punch to serve, especially if Lee Garner, Jr., is coming. Self-serve punch was a popular feature of parties of all kinds in the 1960s, and since guests often had no idea what was in it, or in what quantities, it sometimes left more than a few of them reeling.
In a large mixing bowl, mash the orange peel and sugar. Add the orange and lemon juices and stir until the sugar dissolves. Add the orange extract, blackberry liqueur or brandy, and whiskey and stir. Cover and refrigerate for 2-4 hours.
Take the punch out of the refrigerator and remove the orange peel with a slotted spoon. Place the block of ice in a punch bowl and pour the punch into the bowl. Float the orange slices in the bowl, or garnish each punch cup with a slice.