When dining in Japanese restaurants you should start by saying hello, use chopsticks and don't use them to point when talking, do not pass food with your chopsticks and put sauces into bowls not on the food.
You can survive without etiquette, but knowing and using some etiquette rules can make certain situations go much smoother for you.
Etiquette is the proper mode of conduct or procedure within a certain social realm. Being aware of certain conventions will give you a professional and attractive look. And though practicing good etiquette alone won't get you up the business ladder, it certainly will give you a boost.
just to attract the clients
There are certain shops and restaurants that are open on public holidays in Italy. To find a list you can look online.
Generally, yes. There may be certain exceptions, but restaurants don't usually close on days that promise to be the most profitable.
Maanners are more or less dictated by common sense and how you yourself would like to be treated . Etiquette is more precise behavior dictated by certain segments of society, different cultures, nationalities and ethnic groups.
yes. of course who doesn't know that dummy
It is possible to find a package which includes restaurants, although it is not common. It will be easier to find a package that includes the hotel restaurant.
It is when a certain pattern is continuously followed in the workplace.
sushi?
yes in certain south asian restaurants and supermarkets
日 (hi, nichi - as counter with certain exceptions) is the Japanese word for day.