Steve R.
Seattle Athletic Club(SAC) is well worth checking out if you want a full-service athletic club in downtown.
I will add a big plug for one of their trainers — Greg Svoboda — who is very knowledgeable, approachable, and 100% committed to his craft.
He is especially good for beginners (although he can coach more advanced gym goers as well) and will teach you a ton in a completely non-threatening atmosphere. His expertise is one of the key reasons one should consider SAC!