Combine the sugar and cognac in a 1-quart glass measure. Microwave at high 1 minute or until sugar dissolves, stirring after 30 seconds. Add wine and fruit slices; stir well. Cover and chill.
To serve, add club soda, and stir gently. Serve with additional fruit slices, if desired.
I make this alot for special get togethers and everyone like it!