Because We Can is a California-based architectural studio that makes really cool interiors. I think I first heard of them from their Steampunk office spaces for Three Rings but it could also have been their industrial cat tube.
They’ve designed offices for Hello!Lucky, Mint, Wikimedia, Unity, Pandora, and many others. They also do projects for private homes. Of course these people probably charge a billion dollars for their services, but I think their projects are pretty neat.