The plants on the window sill create a natural atmosphere in this otherwise straight and simple dining area that boasts of a simple and small table with straight chairs. The white round chandelier is a lovely detail in this dining area filled with freshness and natural light.
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!