Originally Posted by
ISTFlyer
In addition to what
ernestnywang mentioned, you would need to show your SFO-DOH boarding pass to the lounge agents in Los Angeles so lounge access might not be possible in LAX if you can't print your boarding pass online. The lounges being in different terminals wouldn't cause an issue but an e-ticket confirmation for the international flight wouldn't be sufficient.
Good point.
I would say though it's best to have the SFO-DOH boarding pass, but if you can't get it via online check-in, you should still try it by showing the e-ticket to lounge agents. All oneworld airlines are able to access each other's e-ticket images.