After reviewing this helpful thread and AA.com, it looks like if you have an award ticket in Business class on a transcontinental flight (this would be SFO-JFK), you get access to the Admirals Club if this is a "U" fare.
However, I booked the ticket with British Airways miles, and I don't see a fare class listed anywhere on the receipt. Does anyone know if this should be a "U" fare?
Thanks.