The Red Onion on San Pablo is a hole-in-the-wall, tiny little diner. But from it's grill comes heavenly hamburgers, cheeseburgers from paradise, delicious grilled cheese, juicy chicken sandwiches, hearty ham and cheese, crispy BLT's and savory Veggie Burgers. That's it. Not a huge menu, but with burgers like theirs, who cares? They also make great pie, crispy fries and sweet onion rings. A 5 star burger without any attitude or pretention at all!
Pros: Best burgers in town!, Good pie!, Sports on TV!
Cons: Postage stamp small!, Can be crowded!, Zero ambience!