There are at least three artists which have used the name City Boy:
These are photos from concerts where City Boy played, so they may be of other bands that played the concert as well.
Barclay James Harvest / Lake / City Boy Dec 11, 1977 Upper Darby, Pennsylvania, United States Uploaded by Zimtrim
Nektar / City Boy / LAKE Nov 19, 1977 Chicago, Illinois, United States Uploaded by Cb 57