All sorts of different things, from playgroups, picnics and outings, to getting in speakers about any and everything of interest.
Seems like the most active members are those whose twins are at least a few years old. I haven't been to a meeting since the twins were born, and no one seems to think anything of it. (I went to several of the "stork moms" subgroup meetings while expecting.) ("Stork moms" is for moms expecting multiples, or with multiples under 1 year of age.)
mommy to three boys: A, 3/04
and identical twins B and D, arrived 9/08