A Biergarten in a hospital. Yes for the last 800 years. The Spitalgarten offers excellent food and beer, and the service was top notch. On May Day I had the haxe and was impressed on how good it was. I came back a couple of days later (on a much quiter evening), and had a super dinner, and Maibock.
A good atmosphere. The restaurant is popular with the locals. The food is good, and the beer (brewed in-house) is excellent. I particularly liked their Pale Ale which was a little too easy to drink given the high alcohol content.