“A Place to Gather and Enjoy the Pace of a Foregone Era of Class and Sophistication”

A slogan of a Portland restaurant that I ran across with a Yelp search. (According to Yelp, the food is very good there.) According to dictionary.com, one of the definitions of “foregone” is “that has gone before; previous; past” — yet I think most readers would recognize the usage in the quote as extremely unidiomatic (to me, humorously so, which is why I’m passing it along).