Susan Sarandon got stranded in Vegas by Hurricane Sandy, but she is still doing her part to help victims of the storm. The “Cloud Atlas” actress couldn’t immediately fly home after attending the Oct. 29 opening of new Simon Hammerstein club the Act in Sin City. But she now plans to hold a benefit tomorrow at her Flatiron pingpong joint, SPiN, to raise money for Breezy Point, Queens, which was ravaged by fire during the storm, destroying more than 100 homes.