My wife and I will be staying in Pittsburgh Sunday night (travelling through from Chicago to Philadelphia). Our hotel is the William Penn. Will most downtown restaurants be closed on a Sunday evening? We would prefer to walk to dinner from our hotel, and would further prefer something rather casual--even bar fare (providing that translates to "good cheeseburger"). After being in the car for 7 hours, a burger and an Iron City sound good to me. Do I have a chance?