Which lounge in SFO?
 

I will use UA from LHR to SFO then transfer to ORD and transit time could be a little longer, over 5 hours.

Besides RCC in terminal 3, are there other nice lounge I can use by UA Golden Card? Where are they? What are their opening time?

Most of my transfering time will be from afternoon to evening and I am happy to walk between terminals for discovering lounges.

Thanks a lot.

preference
 

My preference: good selection of food, free internet for my own laptop, showers, and relaxing or sleep chairs if possible.

Thanks!

I am not optimistic that you will find what you are looking for. UA has an Arrivals lounge but it closes methinks prior to your arrival. Showers, food, etc. - for paid and award F and C tickets. Terminal 3 (the UA and AA terminal) only has a RCC and an AA lounge. No showers, no free internet.

Since you have all that time, you may want to explore the public (pre-security) area of the International Terminal, as it is a beautiful public space, w/museum, some artwork, and many dining selections.