Grind Baltimore is a 24-hour-style gym on the fourth floor at 601 East Pratt Street, by the Inner Harbor. Its recovery amenities include both an infrared sauna and a traditional sauna, and day passes are sold online so visitors can use the club without a membership. Club hours run 5:00 AM to 10:30 PM every day, with staff on site from 8:00 AM on weekdays.