In a large pot over medium high heat, saute the ground beef for 5 minutes.
Add the onions and garlic and saute for 5 to 10 more minutes.
Add the pork and beans, kidney beans, tomatoes, chili powder, beer and season with salt and pepper to taste. Stir thoroughly and reduce heat to medium low.
Cover and simmer for 1 to 1 1/2 hours, stirring occasionally.