I have posted something on Seattle here, down the page a bunch. Backpage is alive and well there and was the source of info for me on two trips, in 2009 and 2010. No point me giving specifics because it would be too dated by now.
Each trip was far better than I had expected, considering it is in the Excited States and all, but it is on what's known as the Left Coast and is far more liberal than most of the USA. A plethora of asian incalls, just like in 'Sauga, especially across the lake closer to Microsoft HQ. Lots of independent ladies, agencies and MPs. My visits were confined to asians, not that I am an exclusionist or specialist, just that I decided that would be my flavor-du-trip. As good a value as we have here and with the usual big-city parking woes. Seems that all up and down the coast is good research ground. Have fun!