J.K.
I had my 4 years old b-day party at the one in wixom, we had about 15 kids. I thought it was perfect. There is plenty of room, but not too much. I had the same problem with the RSVP's and had to call a bunch of parents. A few said they would come and then didn't show up. I think the price is the same there up to 15 kids, so don't RSVP to them with more than 15. Try not to worry, just have fun, they take care of most things for you anyway. Oh, we did bring a case of mini waters for the kids who got thirsty will all the jumping..they let us bring it into the bouncing room. We also brought a fruit tray for parents..nothing fancy. Have fun!