The Westport Library’s MovieLine series will show the recently released tender Irish film Once on March 4th. It’s the sweet story of a Dublin guitarist/singer-songwriter who makes his living fixing vacuum cleaners in his father’s shop by day, and an immigrant Czech woman who plays piano and does odd jobs when not caring for her mother and daughter. They grow to know each other as they put together a demo disc in hopes of landing a music contract. The true romantic will love watching them fall in love through their songs. Yet even as the characters grow to know each other better, the audience never comes to know their names.