98.7 FM WMZQ has been a Country music station in Washington, DC since 1977. Their original program director says he chose the call letters as an homage to Chicago's WMAQ--another successful, large-market Country station.
105.9 FM WJZZ played Jazz in Detroit, Michigan from 1974 until 1996. The station had actually carried this format going all the way back to 1960 when they first began broadcasting with call letters WCHD.
90.7 FM WFAE (W Fine Arts Education) is a non-commercial, public radio station in Charlotte, North Carolina. They went on the air in 1977 and are also heard on 90.3 FM WFHE as well as two translator stations.