I'm gonna be the negative type who predicts failure. Firstly there won't be enough people to make this work. Secondly, most of those who do attend, they will come without preparing questions and assuming/hoping that someone else will have some. As is usual with these sorts of events. Most of us are reactive, not proactive. And yes, I fully admit to being this myself, too.
First event? Will maybe work. Followups? Doubt it.