Join my world of breakfast nook
You could use the same accessories and fixtures for instance, and simply modify the color scheme somewhat. This will allow you to retain your overall design vision, while still having a breakfast nook that is its own unique space. As for space considerations, you will have to design your breakfast nook so that it fits neatly into your available space without sacrificing comfort and convenience. For smaller spaces, you will probably get better results by using a diner style bench or booth that is set flush against the wall. If you have a fairly good sized space, then you could explore your options in standalone tables and chairs.