The website he mentioned is Meetup.com. No matter what your interest is, there are people in groups around the country that are meeting up with similar interests. If you search for motorcycles, there are oodles of motorcycle groups and meet-ups for rides galore. It turns out there are a couple of riding groups near Seattle and various riding groups associated with the motorcycle shop in Everett. This group posts all of their events so you can plan ahead and see what you want to attend. The Meetup.com site is organized so that you can accept, or tentatively accept an invitation so the planners have an idea of how many will be coming. There are photos of past events and rides, and it makes you feel like joining a group because it looks like so much fun.
The website is easy to find your way around, and is set up very well. You can search for groups that are in your local area. This seems like a good way to meet others with the same interests as you, and actually meet in person and not just online. Check out the motorcycle groups here.