Positive Zero Lounge is a jazz bar in the basement of Seongsu in Seoul, where live jazz performances are held. Each table orders one bottle as a minimum, with wine, food, and cocktails alongside. Two-person seats are first come, first served, while tables of four or more can be reserved, and on Saturdays seats fill up around 7:50 p.m. The performance space is dimly lit, so the menu is hard to read.