Is Billy Joel getting friendly again with former flame Carolyn Beegan? The Piano Man, in a jacket, and the artist, in a low-cut dress, were seen huddling over a quiet dinner at the American Hotel in Sag Harbor Wednesday night. They held hands on the way out the door, just before midnight. “It looked like old times, like they were in love,” said an observer. Perhaps the 61-year-old Joel, who dated 29-year-old Alexis Roderick after his split with Katie Lee, now 29, has decided he is comfortable with a woman in her forties?