Flyers at the high school and middle school seem to be a good way to get the word out. Teachers announcing the Cafes in class and even offering extra credit motivate students to attend. I found that reaching out to the homeschooling community (to the parents through Facebook) has been very good at getting new faces to the Cafes. The greatest motivator, however, seems to be when the Teen Leaders talk a group of their friends into coming.
Through the comment cards we saw that none of the students listed social media as the way they learned about the Cafe, even if they were homeschoolers and their parents found out through FB.