As a non-smoker, I know for a fact that Portlanders smoke just as much weed as Washingtonians do. haha.
Most of the arcade folks I've met from the Portland area are PAC members (Portland Arcade Collectors). I'd say a majority of them are more KLOV-type than NG-type. They're mostly into vectors, pre-JAMMA and pins, which is still pretty sweet. A few of them have open game nights every now and then. Most will donate their cabs to the Portland Retro Gaming Expo arcade every October.
I know I've seen a few other Oregon folks on here, but other than SamShoSen and Ian, I don't think I've met any of them.
If I put together a shindig, it's not going to be until the weather warms up a bit.
My setup is out in the garage and it's cold as balls out there until about April or so.
The setup might be ugly, but it works for me.
For consoles, there's a big ol' JVC tube in front of the couch and a Sony PVM-2530 that I keep inside the house that can make its way out there if necessary.