If you have questions, you can ask any of the MGM Grand Detroit Cast Members for assistance. You must be 21 years or older to enter the Casino, and you'll get carded at the door if you don't look the part. MGM Grand Detroit Casino Gambling offers a variety of slot machines and game tables all running 24 hours a day, 7 days a week. MGM Grand Detroit Hotel and Casino is located at 1777 Third Street between the Fisher Freeway (I-75) and Bagley and very accessible from I-75 or the John C. MGM Grand Detroit Casino Gambling in Michigan