1. Squeeze the juice of two oranges into the pitcher and slice the remaining orange into thin slices being careful to remove any seeds and place in the pitcher.  Juice the limes and then add to the pitcher. 
2. Add the strawberries, Grand Marnier, wine and sugar and pour all together, stirring until the sugar is mostly dissolved.  For the best flavor, let the sangria sit for several hours or overnight.  If you don’t have time to chill, replace the sugar with simple syrup.
3. Before serving, add the club soda.  Serve in glasses over ice.

Simple Syrup Instructions:

1. In a small saucepan, combine the sugar and water. Warm the mixture over high heat, stirring often, until the sugar dissolves. Allow to cool before using.  
2. If made ahead, can be stored in an airtight container in the refrigerator for up to 1 month