Thanks. I’m looking at the entrance requirements listed for the Admirals Lounge, since that’s where I want to go. It says

Qualifying First and Business

Includes customers in First or Business on a qualifying departing or arriving international, transcontinental or other domestic flight marketed and operated by American, a oneworld® airline or marketed by Aer Lingus and operated by American.

and also just below that

Qualifying transcontinental

Flights with seats ticketed as Flagship® between:

• New York (JFK) and Los Angeles (LAX)
• JFK and San Francisco (SFO)
• JFK and Orange County (SNA)
• LAX and Miami (MIA)
• LAX and Boston (BOS)

I’m obviously not flagship, as that is an American thing. Which is why I called the Admirals Club. I thought someone here might have tried and either succeeded or failed.