I could see Beecher's being on there because a cheese variety "Venus" is nearby, but AFAIK Beechers does not produce any unique varieties of cheese.
I can confirm you can find a Seattle Dog from a street vendor most nights in Capitol Hill. They are alright.
It's funny that this dish transferred all the way to USA and remained a community staple.
And not to pile on, but the Seattle dog is definitely popular and somewhat ubiquitous to the point it’s common to find cream cheese next to the other condiments at backyard barbecues.
There are other Seattle cuisine items to add here for sure, but the Seattle dog is also a local staple.