From their Facebook page,
Enjoy a FREE beverage when you buy one for a friend. To celebrate the New Year come in to Peet’s for any hand-crafted beverage of your choice and receive a second beverage free. View coupon for details. (If you don’t want to print the coupon, you can show it to your barista on your mobile device.) Offer good through Tuesday, January 18, 2011.
I will test the “show it to your barista on your mobile device” option, but it has worked before with these offers.
Now finding a friend to enjoy a beverage with me is a different task.