Rachel Bilson would make Martha Stewart proud. When the “Hart of Dixie” star hosted a dinner at the Sherbourne in Los Angeles, to celebrate Nylon’s Nov. issue with her on the cover, a spy says: “Rachel walked in to her dinner and rearranged all the seats and place cards so her friends would be more comfortable and content.” Bilson moved her co-star Wilson Bethel directly across from her, and she chatted all night to Ashlee Simpson with her “Boardwalk Empire” beau Vincent Piazza.