No dress code required. Obviously shoes/sandals. I have seen sundresses to skirts, dockers, and polos to everything in between.
It does vary a bit depending on whether lunch or dinner, but we urge you to dress for comfort AND style. Since St. Augustine is a tourist destination, we frequently have guests dressed more casually (jeans, etc.) Jackets are not required. We do require men to wear shirts with sleeves. Enjoy your meal.
I don't think there is a dress code but I wouldn't wear a t-shirt or gym clothes here although I'm sure some people do.
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