In my country it's considered rude to interrupt people while they're talking or eating. We wouldn't want someone to come to the table without being asked. Unles

In my country it's considered rude to interrupt people while they're talking or eating. We wouldn't want someone to come to the table without being asked. Unless you're at a dinner service often water isn't served, you're expected to get it yourself from the counter. In the major cities US-style service is more common and most locals find it annoying and just wave the server away. The worst service I've ever had was in Canada where they do tip, and I was rating that by the North American standards rather than my home country's. I still tipped the standard amount because I disagree with tipping, but he didn't seem incentivised. It's important to rate experiences by what the region is expecting, not by what you expect at home.