Flat Nine is a jazz bar in Sinnonhyeon, Seoul, where a course meal is served alongside a live jazz performance. The classic course includes an aperitif, crispy potato, focaccia, basil tomato lasagna, Jeju black pork tenderloin steak, and tiramisu. The performance features vocals, double bass, and saxophone played close to the tables, and the schedule is posted on Instagram or Naver Place. Flounder aglio e olio can also be ordered as a single pasta dish.