Preheat oven to 350°F. Cook bacon in large skillet over medium heat until crisp. Transfer to paper towels and drain. Transfer 2 1/2 tablespoons bacon drippings from skillet to large bowl. Finely chop bacon; add to bowl. Add onion and next 7 ingredients to bowl and whisk to blend. Whisk in 4 to 6 teaspoons chipotle chilies, depending on spiciness desired. Stir in beans. Transfer bean mixture to 13 x 9 x 2-inch glass baking dish. Bake uncovered until liquid bubbles and thickens slightly, about 1 hour. Cool 10 minutes.