I attended a meetup that was held at Yelp and I can confirm that entrance to the building is weirdly extra secured compared to meetups at other SF companies I've attended.
AFAIK, the CONSENSUS is they run a racket. "Sures is a nice restaurant, would be a reeeel shame if some negative reviews happened to it, wouldn't it" is their business model. (not exaggerating here - Google startup extortion, this is the only company that comes up. They've been sued.)
If you're running an extortion ring, you're not gonna be letting a whooole lot of po'd people in your office.
I would be extremely curious about the specific name. I bet it is someone they have tried to illegally strong-arm by showcasing negative reviews.
