Better than a White Zinfandel!
Beer needs to be cold (Remember - I'm from the US), so the container (bottle, mug, can (if desperate)) gets condensation on it. Which then gets my fingers wet when I take a drink.
Wine, at/near room temperature, doesn't have this horrible side effect. (Keep reading - this makes sense!)
So while I'm playing a riff that's all E, A and D (you know, open strings) I can use my left hand to take a drink. With a beer I have to dry off my fingers to go to a B or G, but with wine I'm good to go!
Meaning more opportunities to take a drink while I'm playing.
Yes, it's genius, I know. And it would be moot if we had beer you could drink at room temperature here, but we don't.