AA???

What does AA stand for? As in "no AA men accepted"

American Airlines

The acronym is generally used by providers to refer to African American's. Some providers choose to have policy's regarding the type of clientele they cater to. Some have age policy's, some have racial policy's etc etc. Each one has their reasons for having these policy's. If you search around you can see there are several discussion with a variety of reasons behind it.

Also referred to NBA, meaning no blacks allowed.