I would say that if you don't feel like talking to the crowd something is wrong and if you force yourself to talk to them things will happen and to that extent things aren't choreographed.
Now supposing I had the part of a young woman to give out, one that wanted some excellent acting. If I were to go to the stage for my actress I would have to take a matured woman, one who would act splendidly, but who would look too old for the requirements.