Putting their hand up for extended periods of time and when the waitress doesn't come, they look annoyed and then go over to the waitress. Or walking into a restaurant saying 'two' meaning two people and then barging through and basically going down to sit at a table
Most Helpful Guy
First isn't rude, the waitress isn't doing their job properly. I've had to do this - I want to pay and leave (or get another drink or whatever I need) and if they don't come to me after an extended period of time, I go to them.
Second one is stupid and rude. I used to work as the host in a restaurant so it was my job to greet people and seat them and give them menus. Barging past and seating yourself could well mean you've sat in a section that isn't being covered right now, or at a table that is reserved, or that hasn't been bussed, or whatever.1