I can see value in attending a round table, I am humble enough to know that there are still lots of thngs I can learn about the business. I initially thought it was silly and never would have entertained the thought of going to one, now I can say that if it convient and fits into my schedule, I would go.
As far as orgs, I have never personally belonged to any industry org and while in my corporate life I had and have to take part in various orgs and trade shows, I see and have experienced ZERO value. I am sure for some people they are important and give them a sense of belonging, I don't need that.
I have learned alot on these boards and from talking to various guys around the country, I will likely visit a RT in the future but I can't ever see myself joining an org. The one that is the most vocal in our idustry is laughable at best.
Just my two pesos.