From the folks over at Improv Everywhere:

For our latest mission we staged the iconic “I am Spartacus!” scene from Spartacus in a Manhattan Starbucks. I ordered a drink and gave the name “Spartacus.” When the barista called the name, a group of 20 men stood up one-by-one proclaiming to be Spartacus. The real punchline arrived at the end, when a man dressed as a Roman slave arrived to claim the beverage. The scene was produced without the knowledge of the Starbucks.

[Improv Everywhere | Via LS]