Nation's is a small regional chain with outposts in downtown oakland (broadway), El Cerrito (san pablo), and recently Berkeley (University). The food has gotten better recently, but it's a simple burger joint of uneven quality, and a far step up from Giant Burgers or Kwik Way. All of these places make you yearn for the quality control, fast service, low prices, and wide menu of a McDonald's or Jack in the Box.
Which is kind of scary, but at 3am, a nice homey touch is a fine thing.
Your other option around that time is Nikko's, which is right across the 23rd street bridge, and open 24 hours.
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