The body, on average, metabolizes one ounce of alcohol per hour. There is roughly one ounce of alcohol in a 12 oz beer, and one ounce in a 5 oz. glass of wine. Coupled with a large meal, I would not be surprised if your BAC is close to .00 by the time you are on the road headed home, unless you consume the beer, the wine, and the meal inside of half an hour. In other words, I don't think you have anything to worry about.