Pour drink to everyone: instead of everyone pouring drink into their glasses themselves, only one person should take charge.
Don’t place elbows on the table: putting your elbows on the table is usually seen as informal & inappropriate.
Don’t talk while chewing: one should not talk while chewing food as it can choke you as well as the person replying.
Don’t talk about controversial topics: it is recommended that you keep the atmosphere of your dinner light & jolly.
Don’t use mobile phone: using your mobile phone while having a meal with somebody makes you look disinterested.
Eating from another person’s plate: you should eat from someone else’s plate as it’s considered mannerless.