DoubleTree Inn at Southcenter.
While the room was ok, the design of the hotel is rooms around a central atrium, which holds a restaurant and bar as well as the front desk and access to the function rooms. The atrium itself has lots of polished wood surfaces and no padding to maybe baffle sound.
This design made our specific room an acoustic nightmare. You could actually hear clearly enough to get snippets of normal conversation from diners in the restaurant which I might have been fine with if we weren't on the 6th floor. If there was someone who talked loudly downstairs it was like they were standing next to you.
That and the ten buck a night internet access made it so we won't be going back.