Dalmachi Plaza BBQ Seongsu (달맞이광장 BBQ 성수)

Dalmachi Plaza BBQ Seongsu (달맞이광장 BBQ) is a late-night Korean grill on Achasan-ro built around a simple proposition — that the neighborhood needs a reliable, hot, satisfying Korean grill that stays open into the small hours. The restaurant opens at noon and runs until 2am every day, which puts it among the latest-closing Korean BBQ options in Seongsu and makes it a natural landing spot for the post-bar crowd, the night-shift workers, and visitors who arrive at the neighborhood's nightlife scene too late for the typical 22:00 closing time. The kitchen handles the standard Korean grill repertoire — pork belly, marinated meats, chicken cuts — with the kind of efficient execution that high-volume late-night service demands. The Korean BBQ proposition centers on the grill at the table, served alongside the expected banchan and dipping sauces, and the kitchen has the experience to handle drunk and sober crowds alike without dropping quality. The space is casual and unfussy, with the kind of energy you would expect from a 2am-open restaurant — louder than the neighborhood's daytime venues, friendly with the late-shift staff who keep regulars happy. With 129 Google reviews at a 4.9-star average, Dalmachi has earned its niche as Seongsu's go-to late-night Korean grill — not the most photographed spot in the neighborhood, but the place you actually go when it's 1am and you need hot food.