A look inside the New York office of Yelp, a $3 billion company that offers its 4,000 employees around the world some of the most incredible perks

When you think of an office, foosball tables, karaoke machines, beer kegs, and free snacks probably don't come to mind ... that is, unless you work at Yelp.

That's right - those are just a few of the enviable perks Yelp offers its 900 New York-based employees.

Founded in 2004 and headquartered in San Francisco, the $3 billion company that allows consumers to locate and review businesses on its mobile app and website now has seven offices around the US and Europe, including one in the heart of Manhattan that Business Insider recently visited.

We went inside the Madison Avenue office to get a clearer picture of what the Yelp culture is really like. Here's what we saw and learned: