I agree with Birdie 1000%. The purpose of groups is to share and for you to show your expertise through helping others, or just sharing in the form of a discussion. It is extremely important to remember that most of marketing these days is absolutely no longer about "advertising" but about "relationship."
I would like to offer you a bit of mentor type of input here, as well. You may want to consider rearranging the approach a bit in what you wrote above, from a general marketing standpoint. You may want to change it from a message that is "I" focused to what you do for others. Consider for a moment that your PC's will want to know what you can do for them vs. what you want to do. When you say..."I would like to offer..." people may immediately turn off. However, if you were to say..."I help attorneys....get [
value statement, value statement]. Let them know how you solve their problem.
I know that wasn't part of your question, but thought I'd take the opportunity to help in that aspect as well.
@Birdie - I would like to say that I personally didn't think you were harsh at all.