AS Board Room members now have access to the SFO CX business lounge effective 8/22/14
According to Board Room Administration, AS has made arrangements with Cathay Pacific for use of their International Terminal lounge at SFO as a "partner" Board Room location. Entry privileges could be active as early as this week.
I understand that this is one of the nicest lounges at SFO, located at Level 4 of the International Terminal after security (in the area with the Air France/KLM, JAL and China Airlines lounges). It's apparently on the small side for an international lounge, but offers a hot entree buffet and noodle bar, along with showers.
Looking forward to trying it out.