So, say you're running a little kink group at your school. You're a little hesitant to do demos, but willing if enough people would show up to prove there was a signifigant interest in the topic (and reason to take some risk). You have people who are interested in the group, but only a handful still show up currently.
What kind of activities would you run? How would you draw people to come back? How do you encourage people to become active members? How do you let new people know its a good group?