In a carafe or pitcher, combine wine, liqueur, juice, and simple syrup. Adjust to suit your taste. Add fruit and refrigerate for several hours. Serve chilled, over ice.
To prepare simple syrup: combine ½ cup granulated sugar and ½ cup water in a small saucepan. Bring to a boil and stir until sugar has dissolved. Chill. Any leftover simple syrup can be stored in the refrigerator and used in coffee or tea.