Yes Club America does exist and is a shared Lounge. There are two that I know of: one in F (before the escalators going down) which was formerly a RCC. The one in E is off a corridor past security similar to where the FL Lounge is at. If memory serves me correctly it is opposite to the FL. I was only at this Club once and its small and crowded. So if you have access to the AC or FL those are probably better.

good luck..