The British Airways Terraces Lounge in Berlin’s Tegel (TXL) airport is a decently-sized lounge. I used this lounge prior to my flight from Tegel to Doha on Qatar Airways.
The lounge has a couple of different seating options: some bar seating, some chairs, and at least one small secluded room. Unfortunately, there were not enough power outlets at the seats.
There’s a typical bare bones assortment of lounge beverages. There was a coffee machine, soft drinks, alcohol, wine, and beer.
The food options were also pretty basic. There were some sandwiches, chips, pretzels, pound cakes, apples, bananas, and mini marshmallows. I found it amusing that the chips were “Hungarian” flavored, but I think that just means that they’re flavored with paprika.
Overall, not a place where I’d want to stay for very long, but your lounge options at TXL are very limited, so you’ll have to make do.