One of the region's largest Burger King franchisees filed for bankruptcy last week, citing weak sales caused by the chain's slumping national market share. Garliz Investments LLC of Post Falls employs about 500 people at 25 Burger Kings in three states. Its restaurants include six Burger Kings in Spokane, along with operations in Airway Heights, Coeur d'Alene, Post Falls, Hayden, Cheney, Colville and other locations in Washington, Idaho and Oregon