The mom who was organizing it told everyone she knows about it and now it's over 10 families who want to join.
So she switched to to a park play date. So instead of being at someone's house (easy for me with a 1 & 3 year old), I'll be running around after 2 kids at a park (not easy)
I'm bummed. Not only do I feel like I lost the socialization (for me & for my 3 year old, who does best with a small number of kids) but I'm not really interested in (yet another, we already belong to 2 park play dates that I don't attend) a park play date. :/