As a Belgian consultant I've spent a lot of time on business lunches and dinners, all over Europe.

Big orgs always invited me in Michelin star restaurants. Smaller orgs usually invited me to emerging restaurants or well known local places.

If you mostly care about discovering the second kind, I would strongly suggest you to ignore the stars and take a look at Michelin's "bib gourmand rating" [0]: these are restaurants where you don't have as much protocol, food is reasonably priced, and typically places I would go to when I could choose myself...

[0] https://guide.michelin.com/nl/nl/restaurants/bib-gourmand