At that time of day, it would have been pretty busy.
These kids also talked about Loyola, which is East Rogers Park - the next area immediately north of Edgewater.
That also used to be lily white and still is for the most part around the University.
At one time, areas a tad north of Loyola University(North Shore up through Evanston) turned Jamaican and was a dicey area.
I don't know what either area is like today.
Heck, even in the 70s there were bums wandering around downtown Cleveland. Looks like Chicago was a nicer place then. (Not surprisingly, I guess)