Mentioned by Eater Denver
The Guide to Drinking in Boulder
"The Sink is Boulder's oldest bar, having been open for 93-years. Located on the university's Hill neighborhood they've become famous over the years having being featured on Diners, Drive-ins and Dives, received visits from President Obama and Anthony Bourdain, and Robert Redford's was even an janitor there in his early days as a CU student. It's a stomping ground for University of Colorado students, families, and tourists as they enjoy the pub food alongside the full bar of drinks in the iconic building."