Book your stay now for the ultimate gaming. Maryland Law dictates that all casino guests must be 21 years of age to enter. As one of the nation's top-awarded casinos, Rocky Gap Casino, Resort & Golf offers multiple award-winning dining, casino, spa, hotel, and bars in Maryland. Ocean Downs Casino: Open 8AM - 2AM, days a year, 7 days a week! Ocean Downs Casino, just 10 minutes from Ocean City, Maryland, has over slot. Visit the top casino in National Harbor. · Prizes are non-transferable. Anyone who opts for casino voluntary exclusion will be excluded from entering any Maryland casino, as well as cashing checks and using credit cards in the. 1 MGM National Harbor ; 2 Horseshoe Casino ; 3 Live! Casino and Hotel ; 4 Ocean Downs ; 5 Rocky Gap Casino Resort. . · Must be 21 years of age or older to participate. Please play. You must. We reserve the right to verify identification and age of all guests. · Drawings will. · Must be present to win. Disclaimer: Maryland law requires an individual to be 21 years of age or older in order to enter the gaming floor or play video lottery terminals. General Rules · No purchase is necessary. Enjoy table games, slots, and more at MGM National Harbor casino.