Dinner parties usually start between 7 p.m. and 8 p.m., and end at about 11 p.m. Ask your hosts what time you should arrive.It's polite to bring flowers,chocolates or a bottle of wine as a gift.Usually the evening starts with drinks and snacks.Do you want to be extra polite?Say how much you like the room,or the pictures on the wall.But remember-it's not polite to ask how much things cost.