Listen, I can say many things that I did not like about Vienna (including its famous chocolate) but I have always seen the people of Vienna very well dressed and groomed.
I swear I would pay to see Anna in Berlin, I would love to see her reaction, because that is terrible.
And no Anna, contrary to what you think, going overdressed is going badly dressed, you are not dressed according to the occasion.
Last but not least, and this is my personal opinion, people who go to the theater do not go there with the intention of going to a "special event" for them it is a normal activity, the public that goes there is used to go there. I think that type of people, in which I include myself, would see Anna as a fool for being dressed like that and looking at and judging other people.
You know who else had a dress code? The Nazis, marking the Jews with a symbol.,