We went to Karben4 over the weekend. The female bartender was very attentive and easy to like. The complimentary popcorn was good. The beer was likable but not out of this world. I will say, the food we ordered was the best part. The portions were just right for being a brewery/bar and the sandwiches were extremely tasty.
The biggest down side is the decor, very cold and uninviting. The walls give off a dark vibe but the lighting seems bright - sterile.
We won't be making this our "go to" bar but we'll probably go back for a sandwich and beer.