Exotics @ Redmond Town Center every sunny Saturday Morning. I have been consistantly going to this gathering and showing the car. There is a parking group organized by radio and lots of rare, cool, fast, and old cars. This gathering starts at 9:00am and ends by 11:00am or so. Sometimes there are organized afternoon drives as well. Here is a
Google Link. That will point you right to it. A quick drive up 520 in the morning is perfect to stretch your legs and then you hang out and chat.
http://www.exoticsatredmondtowncenter.com/