Maru Shabu Hongdae is an all-you-can-eat buffet on the 16th floor of Hongmungwan in Hongdae, Seoul, serving beef and seafood shabu-shabu. The buffet runs from appetizers through dessert, tea, and drinks, and vegetables and shabu ingredients come out together. Two sides are full glass, so you eat looking out over the Seoul skyline and night view. The salad bar may not be fully restocked before closing.