According to Google, that address is on a gravel road in the middle of nowhere. On closer inspection, though, it turns out that Google in their infinite wisdom interprets "1400 Burnet Road, Austin, TX" as "1400 Austin Road, Burnet, TX", so that's wrong.
However, on still closer inspection, numbering on the actual Burnet Road starts at 4000. So, yeah, it's fake, further confirmed by the first three results from Googling the restaurant name. Would've been quicker if I'd started there, I guess.
TL;DR: Dear Boing Boing, could you maybe put in like 30 seconds of due diligence before posting improbable things as truth? This keeps happening.