3 Great Baltimore Hole-in-the-Wall Barbecue Joints. We’ll dive into three of these great Baltimore hole-in-the-wall barbecue joints, providing just a glimpse into the broader tapestry of Baltimore’s rich barbecue culture. These Baltimore hole-in-the-wall barbecue joints stand out for their authenticity, offering not just food, but a full-on sensory journey into the heart of American barbecue.