Back in college, a great local cafe stayed opened into the wee hours ladling up their version of this stuff. The first time I slurped some of it down after midnight, I decided to make black bean soup my own tradition. Mine is hearty and smoky, and if it's lying around, I'll also throw in a can of beer for good taste and in keeping with the spirit of a good night on the town. Like the onion soup, you'll want to make this ahead of time so you're not faced with the prep-work when you and your friends just want to kick back and chow down after a long night. Using smoked bacon makes all the difference in the world because those beans are just begging for that rich, smoky flavor.