OK, I just got off the phone from a customer care rep. He says as far as he knows, the AS lounge in terminal 7 is closed. I asked, "Are you sure"? I know 2 of the 4 daily round trips on the route, JFK-SFO are supposed to be through terminal 8. That is what I know--AFAIK. Through our FT board, it seems that AS lounge flyers can use AA's Admiral's Club. That seems fair. But a bad scenario is booking JFK-SFO on a flight, leaving through Terminal 7, and have no lounge available.
It think it would be fair for the carrier to let pax know, before they do a purchase for this route, and especially if they have paid up for the Alaska Lounge, if there will be a lounge available. If anyone else has more reliable data/news, please come forward.