in spring, baltimore's inner harbor would host thousands of tourists, not dozens of national guardsmen. the u.s.s. "constellation" would be a prime attraction, but today it's a ghost ship. it's executive director is chris rosem. what has been the impact? >> basically, the-- our visitors have all but disappeared right now. >> reporter: since the unrest began, nine conventions have canceled here, costing the city at least $3.7 million. it's a loss felt not just by hotels and high-end restaurants. with fewer customers and a 10:00 p.m. curfew, low-wage restaurant workers like lenny joseph don't get the tips to pay the bills. >> if i don't get the hours, then i can't get the money. so, it's kind of tough actually. >> reporter: then, there's the baltimore orioles. when the team played one game to no one, then moved three home games to tampa bay, that meant that hundreds of vendors were not selling food to 100,000 fans. steven isberg teaches business at the university of baltimore. >> when i go to oriole park, i