The way I understood it was that the lounge in the AA pavilion was for any Chase card holder while the special viewing areas for the concerts and fireworks were for Chase Disney cardholders only.
I may very well be wrong.
I did have an additional question for anyone that knows. Is that location always there or only there for F&W? I will be at Disney in February and would like to check out the lounge just to see something I haven't seen before.