This is the Walstrom House by California-based architect, John Lautner. Even though I would not classify this as a library per se, I find the design of the bookshelves in the open area floorplan as a unique twist to a reading space.
Office Tour: Pacific Brands Underwear Group – Burwood Offices
For "Open to Ideas" sessions, lecture, etc. Arkitekter has created its own offices inside a former corset factory in Gothenburg, designing an open-plan workspace that hosts events for local residents in the evening.
Danhostels har gode lækre certificerede mødelokaler fordelt rundt i hele landet: http://www.danhostel.dk/kursus