Recommended for dinner but from what I saw not necessary. Many tourists in summer clothes.
I recommend wearing a parka.
Not requiired
No
Not needed but reasonably nice dress, collar?
Not required at all.
No jacket required
No, it's relatively casual even at dinner time.
I've never worn a jacket and never felt out of place.
I’ve went in Capri jeans and a nice top very casual atmosphere
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