Cruisemates that are late for dinner!!! How rude. But even worse, cruisemates that have never read any books of etiquette. We cruised with two who thought they were in some low life diner somewhere (no offense to diner owners either - I love a nice diner). We now know to tell them to be ready a half hour before they're supposed to be and after three cruises together, have decided that we are buying them travel size etiquette books! No joke! We love them dearly, but it's time!