The host must always see that every gentleman either knows or is presented to the lady he is to "take in" to dinner, and also, if possible, to the one who is to sit at the other side of him. If the latter introduction is overlooked, people sitting next each other at table nearly always introduce themselves. A gentleman says, "How do you do, Mrs. Jones. I am Arthur Robinson." Or showing her his place card, "I have to introduce myself, this is my name." Or the lady says first, "I am Mrs. Hunter Jones." And the man answers, "How do you do, Mrs. Jones, my name is Titherington Smith."
It is not unusual, in New York, for those placed next each other to talk without introducing themselves—particularly if each can read the name of the other on the place cards.
Other Necessary Introductions
Even in New York's most introductionless circles, people always introduce:
A small group of people who are to sit together anywhere.
Partners at dinner.
The guests at a house party.
Everyone at a small dinner or luncheon.
The four who are at the same bridge table.
Partners or fellow-players in any game.