First, there was the Dupont bookstore flash mob.

Then, people stripped down to their "Live United" tees at Union Station. And, a couple of years later, Wedzilla struck.

Now, it's Chinatown's turn.

This month, D.C. Metro commuters are going to experience a musical flash mob as they tap their toes (or get slightly annoyed) as hundreds of people sing Christmas carols during rush hour.


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Trendspotting: Flash Mobs in D.C.