Cook bacon in a large saucepan over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Drain on paper towels and crumble when cool enough to handle. Leave grease in the skillet.

Sauté onion and celery in bacon grease over medium-high heat until tender, about 3 minutes. Stir in beans, crumbled bacon, oregano, chili powder, and garlic powder; cook until beans have softened, 3 to 5 minutes. Add chicken broth and salsa; bring to a boil. Reduce the heat, cover, and simmer until flavors have blended, about 15 minutes.

Garnish with cheese and cilantro. Serve with tortilla strips.