Hotel Hit Squad: After sampling Jason Atherton’s hefty grills, you’ll need the impressive gym at The Biltmore Mayfair

Few chefs have defined corporate-hip hotel dining as much as Jason Atherton has over the past 10 years. Ian Schrager has installed him in EDITION hotels in New York, Shanghai and London, the InterContinental Dubai Marina hosts an outpost of his Social brand, and last week he came to Grosvenor Square, to the new Biltmore Mayfair, the first European opening for Hilton’s new five-star deluxe LXR Hotels & Resorts group. 

In fact, Atherton has been to this part of town before – his first taste of acclaim was at the helm of Gordon Ramsay’s Maze, on the north side of the square (transformed into Lucky Cat a few months ago). It was the restaurant of 2010. I went once, which is standard for me and the…