practice and culture if not in policy" -- even though that is "precisely the sort of class that the Supreme Court recently rejected in [Wal-Mart]." Jamie S. v. Milwaukee Pub. Schs., 668 F.3d 481, 504 (7th Cir. ["955] 2012) (Rovner, J., concurring in part). Furthermore, simply saying that a company has a "cultural proble