Dig, try a mid market restaurant in china. The experience is illuminating. Some will take the flip flop of a foot and placing foot on chair proceed to clip toe nails, others will chew the food with mouth open, of course, and spit the bones/not wanted bits into a pile on the table cloth.
On other tables some one will scream gam bay and the people will all stand up, screetching their chairs on the floor. And will all drink the most obnoxious wine you may ever taste.
Others will talk on their mobile phones so loud that the person they are calling, on the other side of china, does not need a phone to hear them shouting.
The there are the type who keep spitting on the nice restaurant carpet and the waiters accept it as normal, they are actually offended if you complain.
Then to cap it all you will find it difficult to find a waiter, especially if you complain about anything.
Now, if I want to eat out, I only go into restaurants where the educated chinese go or a prefered western joint