Originally Posted by
dylanks
Either the Alaska lounge (priority pass) or United Club are your best options.
I'd definitely vote for the United Club. It's big, airy, rather new, and has the improved food offerings. Only thing that the Alaska Lounge has over the UC is a better selection of complimentary beer.
They're both rather conveniently located if you're using the inter-terminal connectors, the Alaska Lounge being right at the top of the escalator from the walkway to T5, and the United Club is right next to the walkway from T6.