A dining room can also function well as a work space. The sideboard most likely houses files and office supplies.
How much fun is this space? I could definitely work here! Pops of vibrant color mix well with the white walls and floor. All you need is a little paint and lots of imagination to achieve this look.
Most of use aren't blessed with sculptural stairs like these...but if you are, try utilizing that space for a work area.
How much more simple could it get? A cantilevered desk and built-in shelves provide a minimal and functional work space.