Yesterday I did at seminar at the LIFE conference (www.life2007.org). The seminar was a purity one for girls only. It was awesome. The max capacity for the room was 244 and we had about 500 in there. I had a tiny corner on the stage as there were a bunch on the stage with me.
That night a youth leader told me that in their church huddle times they got into a huge conversation as a result of the time their girls had in the seminar. As a result of that one girl realized her need for Jesus and began a relationship with Him!