Grace Street is a great place for coffee and sweets on 32nd Street in K-Town, and it stays open late (until 11pm most days, and later on the weekends), so it's especially good for a sit-down dessert after dinner. Get a ho-dduk - a Korean donut filled with sugar and nuts, which comes with ice cream - and some shaved snow with toppings like mochi, red bean, condensed milk, and boba.