There are 2 branches of Brauhaus Lemke in Berlin, I went a couple of times at the one near Hackescher Markt. It’s conveniently placed in a very touristy area without being a full tourist trap. The interior is rustical, long wooden tables, the service quite good and the food not bad at all. Nothing exceptional though, I would not go on purpose there, but if you happen to be around and feel like having a German meal, then, go for it! Their Flammkuchens are ok, but I always have high expectations regarding this dish, meat dishes are usually quite tasty and deserts really good. But according to a friend I went with once, the restaurant close to Charlottenburg Castle is slightly better.