I am working on a project, which connects all kinds of groups in different cities in the U.S.A (volunteers, school and hospitals staff, etc) with small local business. I offer those group a free online platform that doesn't require them anything but initial registration of the group representative and filling a short form
I started contacting groups that may be interested by email, but I am afraid that many people will get suspicious or ignore it as they ignore marketing emails, etc.
So other than emailing - how would you find such groups? are there any organizations or websites where I can contact many groups at once? also, I found many groups on Facebook - is it appropriate to contact them via Facebook messages (in my country it is, but I am not sure about the U.S.A)?
Would be glad for some insights.