A handful of people with the nonprofit Congress of Communities was standing on Vernor Highway in southwest Detroit. They were waiting to take the No. 49 bus, not to go anywhere in particular but to get more comfortable with public transit.   This group of organizers signed up for an outing with the Detroit Department of Transportation to learn how to ride the bus and then go back to train their members.   Congress of Communities Executive Director Maria Salinas said the group's clients could..