"I had not at that time the honour of knowing any lady in the assembly beyond my own party."
"True; and nobody can ever be introduced in a ball-room."
– Jane Austen
Pride and Prejudice, Chapter 31. Darcy and Elizabeth. Darcy explains that the reason he danced only four dances at the Meryton ball was because he knew only the ladies in his own party. But Elizabeth mocks his explanation.