Happy Hannah’s brightly coloured room, dressed in retro Viet-memorabilia, is as buzzy as a Honda on a Hanoi street. The no-bookings policy means the buzz can border on chaotic, but the zingy Vietnamese food suits the vibe. Pho is a constant on the menu, with beef, chicken or mushroom optional, while dishes in the ‘You’re so Street’ section might include the textural crunch of crisp tofu sliders, and a rare beef salad. From the grill, tender squid or deliciously sticky coconut-marinated pork spareribs shine. Match them with craft beer or a spicy cocktail and any chaos is under control.