We have never been to any events, however, we had just asked another member of this forum about events. So we wanted to share what she had given us, but it is more in the Chicagoland area.
Most of the planing for poly events in Chicago goes on through one of two places. Here are some links:
Hope that helps and that you come out to some events soon. The poly potluck listed in the meetup.com group is happening at my house, and I also highly recommend the poly support group (which I will have to miss this time).