The local club used to maintain the old meetup where you could sign up for free, but I believe that meetup started charging an obscene amount so I think they dropped it. Check out
http://www.wildducs.org/. They usually meetup on Saturdays to ride up to the mountains. Their first stop is at the Starbucks on Windward. It's the one where Mellow Mushroom and Moe's is located. Now that it's summer, they're most likely meeting around 8 or 9.