For years, Baltimore has been a city divided on east-west lines. East Baltimore political organizations vie with those in West Baltimore. The city's high schools have spirited crosstown rivalries, such as Dunbar and Douglass. Loyalties on the college landscape — Coppin State and Morgan State for example — often divide along the same east-west axis. But on Labor Day weekend, the city's orientation will change; Baltimore will become a north-south town.