God bless the worker who's up all night doing the jobs that need doing while the rest of us sleep or party. From doctors to blue-collar men and women, they keep the city's infrastructure running. When their labor is done, they deserve to get shitfaced as much as the rest of us day walkers. That's why we need bars like D.B. Cooper's, where the doors open at 6 a.m. and stay that way until 1:30 in the morning. The lack of windows at D.B.'s makes the dive look suspiciously like an adult-entertainment emporium, and the air is so thick and dark that it's like being underwater. But the bar's nightlife is great — there's always one man in a cowboy hat passed out against the bar, and there are usually at least three aging lushes dancing to the jukebox. Get there at the right time, and you're likely to see a few recently clocked-out workers in their operating-room scrubs mixed among the guys fighting off the DTs. Said a bartender recently to a request for a tab: "Oh, it's a ray of humanity in here."