Although San Francisco is my 'home' airport the Admirals Club at SFO has so far escaped my completely. I have no status with Oneworld and the club does not acept Priority Club membership cards either.
I finally settled this score yesterday.
The combined American Airlines/ Virgin America terminal is beautiful and really stands out against the old United and Delta terminals at SFO.
The club itself is just as much what you'd expect. There ware some breakfast items and (rather stale) coffee. The Internet was done by AT&T but was faster than I expected at about 3 Mbit. The seating is good (though not luxurious).