I can say that this idea it’s pretty good. I think in this way you could earn only advantages. It would be hard for me to think about such an idea. LOL. Also, I could advise you to try some team-building games at the conference. In this way, you could make the conference more interesting. On another hand, people will make new friends and will strengthen their communicating skills. We had a similar event in our company organized by team-building. In this way, I overcome my problem of speaking in front of people.