This is part of an occasional photo feature that takes you inside the headquarters of today's top tech companies, from the big multinationals to the young startups of Silicon Valley. If you'd like to participate, or have a company to suggest, email me at njackson[at]theatlantic[dot]com.

Founded as Hungry Machine in 2007 by four employees from Revolution Health including now-CEO Tim O'Shaughnessy and president Eddie Frederick, LivingSocial is a daily deals company that has been rapidly expanding since its first deal was offered on July 27, 2009. That deal was for Zengo, a Latin-Asian restaurant in the Chinatown neighborhood of Washington, D.C., the city that LivingSocial is based in. Since then, the site has grown to more than 40 million members.

Story continues after the gallery.

It's not as big as Groupon, but LivingSocial has certainly carved out a space for itself in this crowded market. The company is projected to book more than $500 million in revenue in 2011. In April, its founders completed a $400 million round of funding that has valued their four-year-old project at more than $3 billion.

LivingSocial could soon be valued at even more as it continues to innovate around the daily deals idea. The company now offers LivingSocial Adventures, which are multi-hour social events fully curated and sold as packages; LivingSocial Families, which focuses on family activities like craft fairs, outings to the zoo and trips to kid-friendly restaurants; and LivingSocial Escapes, which organizes unforgettable adventures in your own backyard.