Preheat oven to 450 degrees F.
Heat the oil in a skillet over medium heat, and saute the pepperoni and bacon until evenly browned. Mix in the mushrooms, onion, and green pepper. Cook and stir about 5 minutes, until tender.
In a medium saucepan over medium heat, mix the ingredients from the skillet with the tomato sauce and beer. Season with garlic, oregano, thyme, and salt. Allow the mixture to simmer for about 15 minutes, until slightly thickened. Spread over the pizza crusts, and top with cheese.
Bake 20 to 25 minutes in the preheated oven, until the cheese is melted and the crust is golden brown.