Casual business dress is passe (I don't know how to do an accent aigu on this machine).
I learned this from the Wall St. kid of a friend this weekend. They were informed that, from now on, Business Formal is their required dress code, all week.
That's good news for Brooks Brothers and Ann Taylor - if there is anybody left on Wall St. to need the clothing.
What do I wear to work? Blazers or tweed jackets and tie, and grey trousers. Brooks shirts. I wear good suits to court, but I only own 5 of 'em for court, weddings, and funerals.