One of the first things you will have to ask yourself is where you will be placing your dining table. A round table curiously seems to draw all elements that surround it towards it, thereby anchoring itself (and the chairs) visually more than a rectangular table would. It also takes up less space.
The small and smooth dining table, with simple chairs look like it can fit just anywhere creating a dining area even in no space. The small hanging lights look beautiful complementing the size of the table well.