Also, go back and replace the ones that disappear. You might also want to put some posters in a safe place. Boston Latin used grant money from their Safe Schools mini-grant to buy a glass case that couldn't be broken into. They put posters and announcements about the group in the case. Get Snacks Providing food at your meeting is a great idea.
Food gives people something to do with their hands.
It is a good icebreaker. It gives them something they can share with each other. Food also makes meetings fun. People can take turns bringing food and this makes meetings more communal. Now that you have a faculty advisor, food, a meeting spot and posters advertising your group, you're ready to actually hold the meeting.