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.

Bump is a 26-person start-up known for its iPhone and Android application that allows users to quickly exchange personal and professional information (contacts, photos, messages, applications, music, money, etc.) by bumping their phones together. It's also a start-up with a new office space in Mountain View, California, that, in addition to traditional perks, is outfitted with a ping-pong table and great snack options. Meet, for example, the Bumperator, a happy hour keg that can be bumped with the company's trademark app.

To date, Bump, a Y Combinator company, has been installed more than 45 million times on Android and iOS, making it the seventh most downloaded app of all time in the United States. Backed by Andreessen Horowitz and Sequoia Capital, Bump picks up somewhere between 100,000 and 150,000 new users every day.