Lone Star Steakhouse has shuttered three Southern California locations, leaving the casual restaurant chain without a presence in the state. The Orange County Register reported that Lone Star last week closed restaurants in Tustin, Laguna Hills and Corona, part of a larger series of abrupt closures across the country. The chain, owned by Plano, Texas-based Day Star Restaurant Group, has also recently shut down locations in Colorado, Michigan, and South Dakota. The Southern California closures...