What elevates a venue's status to 'fancy' when the focus is purely on culinary innovation rather than room decor?

Answer

Perfecting one or two signature items to the point of local legend

The fancy status can sometimes derive directly from a chef's specialization, where the mastery and innovation displayed in a single dish define the entire venue's reputation.

What elevates a venue's status to 'fancy' when the focus is purely on culinary innovation rather than room decor?
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