Some of the rooms are connecting. Though helpful, TP isn't always correct. An easy way to confirm this is by emailing or calling the IPO (Itinerary Planning Office) with your request. They will add it to your reservation and they would certainly be able to answer all your questions about the Atrium Club, even though they're located at the GF.
@DisneyFansInNYC, not trying to steer you away from the Atrium Club, but if you want everyone in the same "room," there are a few other alternatives at CR:
The Tower Club level (14th) has gorgeous one and two bedroom suites. Best to call reservations for Tower Club availability since most of those rooms aren't advertised online. While not on CL, BLT villas have a TPV and are HUGE. You can book a cash reservation and even apply applicable discounts. If you need CL, the Garden Wing suites have CL access, however, not with a TPV. But, the CL lounge has a TPV and balcony that you can go out on. With 4 kids and all their friends, these alternatives might work for you and might be a bit cheaper, too. More information about these alternatives is in the CL and BLT chapters of the thread. The hyperlinks are in post 1.