When I first become involved with the atheist movement, it was during college — the age when a lot of people I know first became activists. When I joined the board of the Secular Student Alliance, one of our main goals was to establish more groups on college campuses. We had fewer than 50 affiliated groups at the time.
While the organization’s mission has since changed (it’s now more focused on the quality of groups rather than merely quantity), that initial goal has been realized many times over. There are now more than 300 groups across the country:
It made perfect sense to want to create groups on college campuses. That was the age when students were more likely to want to meet/date/hang out with other atheists, they had the opportunity to get money from their school for their events, and they were really able to think critically about their own beliefs (without parental interference).