You sure can! It actually gets even tastier! For best results allow the sangria to set overnight. The fruit has more time to infuse into the wine and you can adjust after it has had time to sit. As the flavors meld, you will notice that the sangria will get fruitier and sweeter. I always add the ginger ale just before serving. If you want a stronger wine taste, add less ginger ale and more if you want a more of a fruity punch taste.