They don't hold anyone to a standard, however many people do get dressed nice for dinner
No
Jeans to dressed up either is fine
Nice slacks and Shirt (polo shirts are acceptable shirts) for the men and nice blouse and skirt or slacks for women or a nice dress
There really isn't one per say.
I usually wear khakis and a blouse, plus a sweater in the winter.
Casual
In the bar, I would say work casual. In the dining room, I am not sure there is one.
Thanks! Your answer is awaiting moderation.