My favorite *A hubs in Europe are ZRH and CPH. Both are small, efficient, and have easy access to the city. The LX lounge, not surprisingly, is way nicer than the SK lounge.

Pro tip: if you leave security in ZRH there is a Co/Op supermarket right above the train station, and above that there is an outlet of the amazing Sternen Grill with outdoor tables, beer and great sausages. A layover wit Sternen Grill + Sprüngli Chocolate? I might not need the lounge.