Walked in on a Friday for a late lunch. They sat us (a couple) next to a bunch of tables with screaming children - if you have a designated host, they should know better how to seat a room, and know we wouldn't have wanted to sit there. After five or six minutes of sitting amongst the screaming without any acknowledgement or greeting from a server, we got up and left -- the host on the way out, "Have a great day, thanks for coming!" without any obvious observation that we'd actually just been sat by him.