Laboratory is an unincorporated community in Washington County, Pennsylvania, United States. It is home to the Moses Little Tavern. An early variant name was "Pancake", after George Pancake, a pioneer citizen. Laboratory has been noted for it…Laboratory is an unincorporated community in Washington County, Pennsylvania, United States. It is home to the Moses Little Tavern. An early variant name was "Pancake", after George Pancake, a pioneer citizen. Laboratory has been noted for its unusual place name.