My thoughts for after the fairly central to the interest meet is to tour around and have the meets (say every couple of months) at places of interest like Bovington Tank Museum or Castle Drogo, Raceworld Karting, whatever the general interest is.
That's exactly the idea of opening up the events to people that aren't members. If the CCC rallies were strictly members only, I probably wouldn't have joined in the first place. No danger there, I can't afford a DS or Traction