You are looking for an evolution that you fail to materialize.
Dream dictionary: Auditorium dream meanings
(See Hall)
… sitting in the front row of the stalls, gazing at the stage, which, like the entire auditorium, was bathed in funereal gloom. Presently a hollow sounding clock boomed twelve, and, ere the last notes had died away, the orchestra filled with vast formless things that, seating themselves, evidently in their accustomed places, at the signal of their conductor beat their spectral palms frantically together. On to the stage from either wing there then wriggled and writhed in ghastly imitation of worms, shapes which suggested more than I dare to name and which I shrank from analysing. And whilst they were in the midst of their hateful evolutions, a cloud of arrows suddenly burst upon them, and, on looking round, I saw, to my terror, that boxes, circles, and gallery were filled with huntsmen, who now levelled their bows at me. A thousand burning pains rushed through my body,…
(Auditorium | Large hall) A large hall in a dream means comfort, overcoming financial difficulties, a helping wife, a good mistress of the house, a high ranking position that involves little danger, a highway sign, a praiseworthy son, a hard working employee, or a good investment. If the hall is dark, dirty and filled with insects and spider webs in the dream, then it means the opposite.