The Community Learning Center of Greendale is probably a very specific thing to list here, but I get really excited about the possibilities when I think about this place. This building houses the library, parks & rec department, and health department! While I can't speak to how these departments work together, if at all, I think the physical closeness of them already removes a barrier if they were to collaborate on a social prescribing (maybe parks prescribing?) program!
 
https://www.greendale.org/departments/community_learning_center/index.php