Note: "The Deca" is the nicest hotel in the area. "The Silver Cloud" is the closest to Chabad (and the Shabbat minyan).
Shabbat near the University of Washington: We have a Chabad House shul right off of campus, located at 4541 19th Ave NE. Shabbat day services start at 10:00 am, and is followed by a Kiddush. Mincha follows the Kiddush during the winter. Friday nights, you can join us at Chabad UW for services and meals. For more information, click here.
Shabbat in Downtown: If you are staying in downtown Seattle, there are Orthodox services held in the Council House retirement home. For information, click here: www.capitolhillminyan.com/.