Metromedia Steakhouses Co., parent company of buffet restaurant chains Ponderosa Steakhouse and Bonanza Steakhouse, filed Chapter 11 bankruptcy. Plano, TX-based Metromedia said it would continue to operate as normal throughout the restructuring process, as it has already secured debtor-in-possession financing. The company listed $1 million to $10 million in assets and $100 million to $500 million in debt in its filing. Ponderosa and Bonanza franchisees were not included in the filing.