Young Women Could Not Go Alone
For parties, dinners, and theater engagements, single women had to be chaperoned. Usually, their mother, older brother, or another married lady would escort them into the event. If none of these figures were available, the hostess would act as a chaperone to bring the young lady in.
Etiquette permitted girls to escort themselves to luncheons or afternoon tea, even sitting alone if she wished. But evening events required young ladies to have a chaperone, and married women to enter with their husbands or with a group.