Grinroom is a cafe in Seongsu, Seoul, on the third floor of Looftop at 136 Wangsimni-ro, Seongdong-gu. It serves coffee, gelato, desserts and alcohol, including vanilla latte, fresh lemon lemonade, vegan earl grey fig financiers, and a black sesame bagel with pistachio cream cheese. The space has a large outdoor terrace and a rooftop, used as a cafe during the day and for wine and beer at night. The daytime and nighttime atmospheres differ, and the full-length windows can all be opened.