Making Sangria. How much soda would I add to the mix?

Hello. I don't drink but am trying to make a treat for my coworkers. I have bought premade sangria bottles recommended by the nice guy at Bevmo, fresh fruit and ginger ale. How many parts ginger ale would I add to the sangria? Half and half or 3/4 sangria 1/4 ginger ale per drink? I tried looking online but all the recipes start with scratch bwith juice and wine. Thanks! via /r/alcohol https://ift.tt/2GlBkft