Dark wall, with dark wood furniture illuminated with warm lighting does not make the space seem narrow, as one would imagine, rather it makes the whole area appear quite warm and cozy. The black chairs complement the black wall, and the bench is definitely the center of attraction of this open dining space.
It's a commonly accepted myth that dining table and chairs have to all match absolutely perfectly, but a little variation can work terrifically well. By selecting a few different shades for seat pads, a funky and modern look can be effortlessly created and against a neutral backdrop, such as a white wall, the visual impact will be utterly incredible. Different colour palettes could even be used, seasonally.