Try some two handed or even single handed races. The Toucan Duet regatta was a success this year because it created a format that brought out people who normally did not feel they were competitive. The Kansas City Ski Club is famous for having several thousand members, of which only several hundred ever actually ski. The club has one great party each month, and they are legendary. Plan to schedule at least one fleet event every month of the year, and invite some non sailing friends.
Many people join fleets or clubs specifically for the social activities.
They participate in the races, but they really live for the non-racing interaction and meeting new people. See Andy Burdick, Jim Gluek, the Jewetts and Dave Keck. Even if you don t have a family, this all means we are a fun class open to all. Several generations may be on a family members or friends of a C Boater in your events. When the non-sailors start having fun also, then more fleet members will participate in your events more frequently.