I fell for that draft beer trick at the Allianz, I thought it was normal beer but it was alcohol free PaulanerJCastle taking this question here since that DDT is a few days old.
I honestly can't say for certain which beer it was or if it was alcohol free. I'm pretty sure it was a Kronenbourg, but the menu just said "draft beer". Trying to dig up which beer it is led me to Euro 2016 articles about how the beer the French were serving was the 0.5% abv stuff, but I couldn't confirm if that's always the case for Parc des Princes or not. ¯\_(ツ)_/¯