C.B.
I just posted the same question yesterday and unfortunately have only gotten two responses. Both of them suggested that I look into my park district. Wish I could give you some other ideas but I'm at a loss for ideas myself. Good luck!
The Elk Grove Park District is a great suggestion but I already checked into that for our own party and they are completely booked on the weekends for February, March & April except for March 17th from 6:30-8:30 which was a little late for us. It's a fun place to go and play though. It's called Jumps 'N Jiggles.