We get people interested in a technology or idea. Then the learners are invited for more exploration and deeper learning at hackerspaces or community learning spaces.
In my drifting life, I often crash in on campuses across Asia, seeing what is being discussed. Also, such events often have free food (free food tastes better than the one you pay for).
In one such campus, I happened to find an ex-student talking to current students on how to study better. I was expecting some fancy method but the ex-student had a single slide with these words.
Share out loud.