I received excellent advice in this thread and its predecessor.
https://forums.pelicanparts.com/off-topic-discussions/1004186-vacation-seattle-area.html
I love the Space Needle as a tourist and I’m
Bummed that the restaurant isn’t open. A boat cruise is essential, but why don’t you look at the ferry to Bainbridge Island instead? A two fer one shot. Pike Market, obviously. I have never been interested but the glass gardens seem like an hour or two diversion, not a half day excursion.