In the Los Angeles area, the second largest population center in the nation, there are only a couple of official CL flying sites, and actually very few RC sites, and zero large free flight sites. Even though there are a TON of prospective CL flyers (kids), the sheer population density has made it difficult to keep flying sites open, let alone open new ones. With fewer flying sites, there is less flying going on. Also, most of the flying sites that are still in operation are far from "foot traffic", or kids on bikes, etc. Whittier Narrows is alongside a freeway but sorta hidden behind trees. The circles at Sepulveda Basin are quite a ways from the nearest major street. With less flying going on, and less opportunity for new flyers to accidentally see us flying, from their car, or their bicycle, then there is far less chance of randomly picking up new builders, flyers, etc.
I think one idea would be for clubs to literally advertise in local papers, on a regular basis, with an extra push for contests, and try to engage the local media to come out and write stories. Also ads in church bulletins and such might work. Also targeted mailing (and emailing) to Scout Troops, plus flyers provided in quantity to local elementary, middle, and high schools to be posted or passed out. It's an expense, but it might make a difference. Just a few ideas from left-field.
I'm not giving up. Yet.
Paul Wescott