That is a look UK-based fashion-forward people might refer to as 'smart casual'.
In the UK (imo) 'chic' is a word that's most always applied to womenswear. (Hence the slight amusement at the term 'casual chic'.)
The gentleman in your photo here is clearly 'Continental' as he has forgotten to put his socks on.
This is unlikely to happen in the UK where we wear socks with our sandals, naturally.
I will attend the event dressed similarly to your photo here, but with my socks on.
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