a "cattle call" style information session prolly would not be in the best interests of the sport. I subscribe to the school of thought that the best way to get quality players into airsoft is word of mouth. Most people on course with me now know that I play airsoft - but unless I think they would be a standup individual within the community I tend to not make it sound very interesting... Seems to work.
Cudos for wanting to get more people around you involved though.