I contacted my LBS and Let them know that I wanted like minded riders to join. Several of us now ride together on a regular basis, and we have several summer riders that come occasionally. Another group was started by our LBS by advertising a ride for a certain fitness of rider, and the ride would be on a Sunday morning, starting at 9 AM. This group has turned into an "Elite riders" group, but they are now out riding on a regular basis again.