I just came off the Wonder and did the Palo brunch. I called there first to ask about the attire and was told that you could do casual or dress up. When we arrived, it was exactly like I was told. My group and several others were casual (capri with top, etc., men with polo shirts and slacks) There was a group that was a littlre more dressed up - kind of like country club lunch date attire - men with jackets with open neck shirt, women with nice sundresses (like you would wear to a summer wedding). No one seemed out of place, though.