It used to be that Soho House was the only game in town as far as private clubs went in the Meatpacking. But then came Chez Margeaux. And now, a club has arrived whose name means “daredevil,” with a London pedigree. So, Manhattan’s Meatpacking District is about to become even swankier. The members-only private club Casse Cou is set to open soon, at 453 West 17th Street. Although there’s currently no clear opening date, we’re ready ready for it. A Chic…