I personally barely understand the benefit of a lounge in a hotel as-is; perhaps in an airport, where options are limited and poor, it makes sense. In the middle of a city? With tons of great food options around, with local flavor and wonderful scenery to enjoy, you'd rather pay $45 for two supremely mediocre buffets?
No. You can absolutely do better than that in downtown Seattle. The options are already listed. If you make a convenience choice — perhaps you're insanely busy, you have no time to ever go to a restaurant even next-door or in the hotel itself — that's fine, but otherwise go out and get some quality food in a city known for lots of excellent dining options.