I would say classy. Nice pants & nice shirt. No Jean's
I agree, depends on the show, but generally I have seen many different styles the women. Some choose to dress up. This is at the Opera, and some some just dress nicely. I have seen long dresses and even sequins, but this is not the rule. The young girls usually dress up in cocktail type appsarel.
No ties. A few had jackets
It would depend upon the show.
Thanks! Your answer is awaiting moderation.