Describe the events that lead to Esther’s food poisoning.

During the movie, Esther begins to feel sick, so Betsy accompanies her back to the hotel. In the cab back to the hotel, Esther and Betsy both vomit, and the next thing that Esther remembers is seeing someone else's shoe. All of the girls have food poisoning from the Ladies Day banquet, and find themselves in the hospital.