They have 2 branches in Hanoi, I’ve only been to the one at:5 Hang Tre, Hoan Kiem District (Hang Tre is pronounced Hang Che).
On a cool, rainless evening, request for a place on the rooftop, where you will stay inside comfortable cabanas. Make sure your socks are presentable, as you may have to remove your shoes. Order the corn-flavored water; very refreshing. The plum wine is expectedly sweet, yet even if I do not like sweet alcoholic drinks, I found this one a pleasant surprise. My favorite dishes - the catfish spring roll, the caramelized pork in claypot, and the clams with shrimp crackers - are delightful! I’ve tried the fear factor fried scorpion dish; nothing to call home about. Souvenir t-shirt’s kinda cool. They also serve exotic wines and potions there, but I steered clear. A lot of them are for virility, and I didn’t need that.