Chatting Obama workers swept in and out of a Coffee Perk in College Park, headquarters for people being sent out to canvas the surrounding area.

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Perk up with a caffeine boost and breakfast at Monmouth Coffee, then walk east to cross Tower Bridge and admire the 11th-Century Tower of London.

BBC: A perfect day in London

The Keurig system has proven to be a nice employee perk and businesses are installing thousands of them, while Green Mountain also reaps a stream of pure profit from coffee roasters who pay a fee to use its K-Pack cups.

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