The Fitness Center at The Westin Seattle
The fitness center at The Westin Seattle is recommended by writers. Of the 7 publications tracked on TripExpert, 2 mentioned the fitness center, like Oyster and Star Service.
The Westin Seattle 
Oyster
Star Service
Oyster "This fitness-focused hotel provides loaner workout gear (for a small fee), guided city runs, a small 24-hour gym, and an indoor pool with a sundeck"
Star Service "The large indoor pool in the north tower and 24-hour gym with professional equipment help guests unwind, and in-room spa services are a nice touch"
