Lang Thang Coffee & More is a bar on Truc Bach Island in Hanoi that serves a mango sticky rice cocktail and original cocktails built on Vietnamese flavors. The signature mango sticky rice drink is creamy, tart and sweet, and other drinks use local ingredients that are infused in-house or clarified. The interior is small and there is outdoor seating, and by 9 p.m. on weekend nights the seats fill up and spill onto the sidewalk. The space is tight, so weekends are crowded and cocktails take a little time to make.