If "Adam's Rib" and "Moneyball" mated and begat a play, it might be "Skybox," a comedy of class warfare and the battle of the sexes that is set in the luxury box of a major league baseball park. The play, written by Walt Stepp and directed by Lissa Moira, is the successor to their collaboration on "Siren's Heart: Norma Jean and Marilyn in Purgatory," a play by Stepp which started at Theater for the New City and is now running Off-Broadway at the Actors Temple Theatre. Theater for the New City will present "Skybox" November 8 to December 2 in its Cino Theater.