This is not a review as I have never visited this establishment however I do have a suggestion for the owners and the chef (a rather obvious one for German food lovers in London I think) but here goes:-
Judging by the 2 reviews posted here (one from 2012 and the other 2014) it would seem the quality and variety of food served is poor to say the least.
You are located perfectly to access the renound Borough Food market where you could obtain fresh authentic German produce on a daily basis. It might even be possible to arrange delivery to your premises.
There's absolutely no excuse for low quality meals which are clearly being offered here at Zeitgeist which is such a bad reflection of the German culinary experience.
I was excited to learn about the existence of your pub and the availability of good German beers accompanied by some delicious food however based solely on the 2 reviews, regretfully, I shall give you a miss.
Time to shake things up Zeitgeist, you're missing out on a massive opportunity to become the best German pub in London serving the best food which, in turn, becomes a magnet for returning customers.
Disappointed of Dulwich.