After World War II, Maryland officials officially authorized slot machines in Charles County and St. In the 20 th Century, Maryland was far more relaxed about gambling than Virginia.
Slot Machines (and Casino Gambling?) on the Maryland-Virginia Waterfront Slot Machines (and Casino Gambling?) on the Maryland-Virginia Waterfrontīetween 1949-1958, gamblers could walk from the Virginia shoreline in Prince William, King George, and Westmoreland counties to slot machine casinos in Maryland, crossing on piers beyond the low water mark of the Potomac River to reach Charles and St.