Work clothes or a little dressy
Smart or business casual to business, I'd say.
Business casual is fine. Nice shirt, pants, and shoes. The mood is for a nice sit-down dinner.
Nice casual
Dress up, but not black tie formal.
Very nice atmosphere, I didn't wear a suit and tie, but you would fit in fine with one.
Dress up comfortably
So a dress shirt is fine, tie and or suit optional if you'd like to fancy up for an occasion. My wife wore a blouse and skirt but a dress would work too.
Date night dress up :-)
It is definitely a dress up kind of place.
I would recommend a suit and dress.
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