Man the original poster's comments are a bit picky. The worst eating experience I had was in a mid-range restaurant:
1) The waitress did not say "Hello" or even say anything. She just stared blankly at us waiting for us to order. (I actually had to ask if she was taking orders to find out...)
2) They got our dishes wrong, and when we said so, they denied it. Eventually, the waitress brought it back to the cook (with an annoyed expression), and got our dishes correct. (Unfortunately, she forgot the soup, so she had to go back again...before coming back and almost throwing the soup onto the table)
3) The wait staff were chatting with each other at the bar, while we kept waving for their attention. Took about 5 minutes to actually get them to come over. (If that sounds short, imagine sitting at a table, waving at a single person for 300 seconds)
Of course, the looks on their faces when we plopped down a 5 cent tip was classic...
I'm pretty sure that I've recieved better service at McDonalds than over there.