I think blue laws vary by county here in Maryland, too. I remember years ago when I worked in restaurants, in P.G County were weren't allowed to sell alcohol before noon on Sundays. We'd get people coming in at 10:00 or 11:00am and trying to order bloody marys and other brunch-style drinks and they'd get pissed off all the time when told they had to wait until noon. As far as I know it's still like that.