It's 60% lemon juice and 40% beer here, so it makes a 2% alcohol beer... It's good when you're thirsty and tired like hell, because it's refreshing.
We have a lot "lemon beers" now and one with apple juice...
Believe me, I can drink beer, but I actually had one more class after that visit to the caffe, and it was like 35° outside, oh, and I was damn hungry, so I didn't want to get "hit in my head" by alcohol when I still had school.