Try your park district. At the park across the street from me, I see tents up occassionally, balloons, etc... I am not sure if they are allowed to have grills, though. Also, there is a park building that we can rent for approx. 100. dollars for 2 hours. (I live in Arlington Hts.) There is also a pool on the premises. The pools that have parks like this that I can think of in my town are.... Pioneer Park, Heritage Park, Lake Arlington, and Frontier Park.