Pearl St. Mall
This Starbucks is located on the Pearl St. Mall, which is an analog to the 16th St. Mall down in Denver, only much smaller--16th St. has three Starbucks with a couple more just a block away. Yet one barista at this location insists that the Pearl St. location has more atmosphere. With its brick interior and quaint exterior, I might be inclined to agree.
A visitor to my site tells me that there is a great love letter on the wall to the right of the bar. I hope it is still there the next time I visit Boulder so that I can read it.