After a five-year run, Nob Hill’s first truly upscale steakhouse went dark last week, according to a member of the owning family. He did go on record that the Gruet winery itself is up 8 percent in sales this year, so there’s no need to stockpile magnums of Champagne (or Pinot Noir ... Gruet’s is excellent, give it a try). Besides the restaurant’s excellent wine, steaks (adieu, petit filet!) and seafood, the wait staff at Gruet Steakhouse was consistently exceptional in a town known for spotty service. I’m very sad to see it go.