Meanwhile, melt remaining 3 tablespoons butter in 4-quart saucepan over low heat. Stir in flour. Cook 1 minute, stirring with whisk. While continuing to stir, add milk and beer. Cook and stir 1 to 2 minutes or until thickened and smooth. Remove from heat; stir in cheeses, salt and pepper. Add cooked macaroni; stir well.