If you want to try, the Lusso's direct phone number is or was (509) 747-9750.
The Davenport Classic and Davenport Tower have shared facilities for a while.
Thx. Lusso's must be sharing it now too, as Lusso was the one I dialed & the # listed on the Marriott site wasn't the above but was the same for all 3 properties. Note: I didn't dial the above as I already have the information I need for the exec lounge sticky, so it might work as well but on the Marriott site the phone # is the same for the 3.
Cheers.