My mothers group was really huge ... 17 mums and 18 babies (one mum had twins). It was ok while it lasted, good for the day out but honestly I am not good in big group situations, I prefer one on one or smaller groups. I also didn't like the "competition" between the mums.
Its been 18 months since I have caught up with most of the girls BUT I do see one or two every now and then. I found joining something like a playgroup (ours is through the Salvos) MUCH more beneficial and a lot friendlier as most of th emothers were not first timers.

Nae x