Guess The Genre #1851 (Gathered by Ken Anderson)

ksan 95 hot rocks San Francisco wktk 105 hot rocks Baltimore
kvan 1480 hot rocks Vancouver kfig 101 hot rocks Fresno
wiot 104 hot rocks Toledo kisw 100 hot rocks Seattle
ksjo 92 hot rocks San Jose wioq 102 hot rocks Philadelphia
1977blankhotrocks 1978blankhotrocks

Answer: Radio Stations Present Hot Rocks (rollover for city) - Next is Guess the Genre #1852

Or, I don't want to guess - Show Me A List