An Old Mystery

I'm going through old family photos and came across this one.  No info written on the back.  I don't recognize any faces, and have  no idea what A.A.A.H. stands for.  I can see the letters seem to be taped onto the box or whatever that is.  Also everyone is pointing at the row of hats lined up down front.

It's almost like these fellows knew someone would come across this photo someday, and they're playing with me, teasing me, daring me to figure this one out.

Any help would be greatly appreciated in identifying this photo.  Many thanks!