Capitol Square 212a Massachusetts Ave, Arlington, MA02474 Capitol Square is a shopping and entertainment area based in Arlington with many businesses and services, including…More restaurants, cafes, art galleries, crafts toy stores, clothing and shoe boutiques and more. It also has the Capitol Theatre, which offers birthday parties and family movies. The locarion hosts many events, including art shows, cultural events, music and more. The site is operated by the Capitol Square Business Association and is accessible by public transportation. Check the main website for a full directory or for details on upcoming events.