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.
If you have one formal and one casual dining space, you can really go to town with different chair designs for both. A casual spot will do best with sociable, comfy seating that naturally leads to conversation, whereas a formal setting is where you can play around with luxury fabrics. If you only have one dining room, you're going to need to combine all of these elements in one set of chairs, if possible!