Hey Kelly --- I pay for my meetings and I feel I'm entitled to hear. I'm very bold and will put my hand up and say, "Sorry, I didn't hear what that lady said, could you please repeat it?" It pretty much shuts them up.
If that doesn't work talk to your leader after the meeting --> (I remember as a leader we were taught to go right to the chatting member and ask if they had something to share) I know how frustrating it can be and yes, you do get po'd! After all you are there to learn something and wish they would just shut up!