Once a hub for travel to and from Charm City, Baltimore’s former Greyhound bus station sits in the shadow of a slow-moving light rail and collects dust. But potential is bouncing off the walls. Where our lobby is going to be used to be a restaurant,” Abby Markoe said as she offered a tour of her youth group’s future headquarters to a Baltimore Banner reporter. In another year or so, downtown will trade in blighted bus bays for squeaky new squash courts.