"Two Ninas" marks a lively debut for writer-director Neil Turitz. The plot is boy-meets-babe basic — just double up on the babes. Dating loser Marty Sachs (a solid Ron Livingston) is ready to dump Gotham for less-competitive Maine when, boom, he meets two willing Ninas — Cohen (Cara Buono) and Harris (Amanda Peet) — and tries to juggle them both. Silly boy. Sassy movie. The performances are moonbeam-light. Peet is a scrappy pleasure, and "Law and Order" rerun freaks will be jazzed by Jill Hennessy as a Texas bartender. Turitz keeps it comic and romantic in just the right doses. Looking for a fun date flick? You found it.