SUM hookah bar Sinsa is a hookah bar on the basement floor of an alley in Sinsa-dong, near Sinsa Station. It offers signature cocktails, non-alcoholic drinks, and a range of hookah flavors including berry, mint, and bubblegum. Seating includes sofas and other comfortable spots, so staying for a long time is easy. Staff explain the hookah flavors as you choose, and cocktails and snacks can be ordered as well.