Tinz and Olivia Hate Each Other More Than They Hate GenocideTinsley Mortimer and Olivia Palermo hate each other so much they couldn’t jointly host a benefit for Darfur. John Mayer took Mandy Moore to lunch (at La Esquina) and Cameron Diaz to dinner (at Indochine) on the same day. New School president Bob Kerrey, a former governor and senator from Nebraska, might move back to run Chuck Hagel’s senate seat. Ivanka Trump instituted a “no midriff, no bikini bottom” rule for her October Stuff magazine cover. Former Jets QB Joe Namath is now a grandfather, though his daughter is only 16. Billy Joel thinks his Hamptons benefit concert was overpriced — and not that good. A Mr. Chow is opening in Vegas. Giants safety Will Demps is done with groupies. A Maxim writer thinks Sanjaya and Adrian Grenier are doppelgängers.