Modern breakfast nook furniture can usually seat 2-6 people, depending on the exact size of the table and the number of seats included with the set. Some small breakfast nooks designed for apartments will only seat 2-3 people comfortably, especially if you’re laying out dishes for serving on the table.
Breakfast nook sets with bench seating can help you squeeze in 6 or more people for a gathering. How many heads you can seat depends on the size of the people.  Kids can often fit more comfortably on bench seating than adults for this reason. If you regularly entertain groups with children, bench seating is a great way to make the most of your available space.