An example from Hamburg is the Energiebunker. I went on a tour a few years ago which I can recommend. One comment was they had trouble with the local landlords

An example from Hamburg is the Energiebunker. I went on a tour a few years ago which I can recommend. One comment was they had trouble with the local landlords not wanting to take up the offer resulting in poor utilisation. https://www.internationale-bauausstellung-hamburg.de/en/projects/energiebunker/projekt/energy-bunker.html https://www.internationale-bauausstellung-hamburg.de/en/proj...