Having a club business session at the beginning of each meeting, for the 1st hour, or "until we're done" and then the casual meeting / social afterwards sounds good to me.
We can record the highlights of what was said in the club business sessions and post them on the forum. That way those who did not come to a given meeting can see what was discussed, we can do this starting next meeting.
I'm not a fan of Robert's Rules of Order, since its so dry and long-winded, but a very basic system of getting stuff done is a good plan.