Mercer Arena

It took me a while, but I also figured out what the big building in this historic photo was -- or at least, I'm pretty sure. The picture of hockey players in the bottom left is what tipped me off, though I went down the wrong track at first, thinking it was somewhere the Seattle Metropolitans (the most famous Seattle hockey team) played. But I'm now pretty sure it's the old Mercer Arena, which was briefly used by a lower-level hockey team (before becoming a sad story of its own).