The company that operated the recently shuttered Georgetown ice cream restaurant Serendipity 3 has filed for Chapter 11 bankruptcy, saying it owes more than $2 million to creditors, including its own principal and Marlena Kent Cook. The entity, 3150 M Restaurant Group LLC, outlined the debts in its May 30 bankruptcy filing in U.S. Bankruptcy Court for D.C. The company, which operated Serendipity at Wisconsin Avenue and M Street NW, listed assets of less than $50,000. The debts include nearly…