I fly out of SFO so I'm a regular at the Polaris lounge there. Sounds like I'm one of the few people that really like the Polaris burger, I actually get excited on the ride to the airport about downing one.
Last few times I was there the buffet actually looked really good and I grabbed some pasta and garlic bread after my burger.
That place is never super busy. There are huge swaths of that lounge opposite the food on both floors that nobody ever sits in.