Welcome, Jon.
As you can see from my info, I'm not even close to you. However, from my own experience, I recommend you look for cruise-ins and show-and-shines in your area. If WA is like TX, these things are happening continuously; it becomes a matter of how far you want to drive. These are the "show what ya brung" events, where you'll see cars/trucks from beaters to top-notch. Ask around those events. Oftentimes you'll see smaller regional clubs having a presence there.
Around here, Sonic Drive-Ins are frequently busy on Saturday nights. A nearby Hooters had their monthly "Midnight Madness" show recently.
You might want to look over list:
link 1 link 2 link 3 Bill