Originally Posted by
davidgrahammd
The area in Charlotte is pre-security. They will take walk-ins on Monday and Friday but it is on a first come first served with no guarantee. My girlfriend arrived at 7AM to be number 7 on the list and was about the last one to be taken that day. YMMV
I would be very surprised if any of the areas were after security
IIRC ATL used to be airside, on the sort of mezzanine level of E when you come up from customs and immigration and near where there was a currency exchange. AFAIK it's moved and is now landside.