Heat the olive oil in a large heavy skillet over medium-high heat. Add the onions, garlic, chili powder, oregano, 1 teaspoon salt and a few grinds of pepper. Cook, stirring occasionally, until the onion is soft, 3 to 5 minutes. Stir in the tomato paste, the chipotle chiles and sauce, and cook for 1 minute. Add the beef and cook, breaking it up with a wooden spoon, until no longer pink, about 3 minutes.
Add the beer and simmer until reduced by about half, about 8 minutes. Add the tomatoes and beans and bring to a boil. Cook, uncovered, stirring occasionally, until thick, about 10 minutes. Adjust the seasoning with salt and pepper and serve with desired assorted toppings.
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