I recently attended a lego event organized by a group from northern illinois. Warrenville is a hike from downtown Chicago. The park district's building was new and well suited to the event. It was clean and modern. Parking was free and sufficient. Probably a good option for hosting events if the size is sufficient.
Friendly and knowledgeable staff. You can pay your water bill here.
Great workout facility although slightly lacking in number of treadmills and ellipticals (although it does have an indoor track)
Great classes for kids and basketball court with running track indoors. Also great ballet classes for girls.
I love the park district dance programs. I have learned to line dance, two step, double two, east coast swing and many others. It's a great social experience and exercise. Will keep coming back for more.
Nice park district
They have great events in the Summer for the community.