I read an article in Wired mag some years back showing a cluster graph depicting smoking quitters and the "cluster" of folks (represented by dots) that formed around original quitter. Generally the closest dots would be family, co-workers etc. extending to their close acquaintances... Looked a lot like our galaxy, universe. My guess is it's the same for sober. Your sober gravity will attract others. Proselytizing does not work. Folks can't hear or see till they can.