Answer
• It is customary to greet your host or server with a polite 'Sawasdee' when entering a restaurant.
• Always use your right hand for eating and passing food, as the left hand is considered impolite.
• It is common to share dishes among the table, so do not be surprised if everyone orders several items to share.
• When dining, it is polite to wait for the eldest person at the table to start eating before you begin.
• Tipping is appreciated but not mandatory; rounding up the bill or leaving small change is common.
Practical Chiang Mai planning note: Choose by location, dietary needs, hygiene, atmosphere and the time you plan to visit rather than relying on a single "best" list. Menus, opening days and stall locations change, especially at markets and seasonal venues.