"My grandmother primarily raised me, and she was born in 1900. With my mother having been born when my grandma was 36, it was almost 2 generation gaps if not 3. Though she didn't care for rock and roll at all (more of a Lawrence Welk fan), it was always WOWO on in the house and car when the TV wasn't on. WOWO seemingly played just about all of the top 40. I got my first taste of the Beach Boys, The Crystals (yes I remember "Barbara Ann" and "My Boyfriend's Back" as a couple of the first songs I remember on the radio), Leslie Gore, Jewel Aiken. When the Beatles came along in '64, WOWO played them. I'm sure Grandma was listening more for the personalities, news and information than the music, but even as early as 1963, WOWO was a full-service station playing contemporary music. After briefly turning things down and going more MOR in 1968 (promptly falling to number 2 behind peanut-powered top 40 WLYV), they went more contemporary again and by the late 70s, they were rocking as hard as WMEE or WPTH between personality bits, news and farm reports. I could definitely tell the difference between WOWO and stations like WJR and WLW."
There are some interesting examples of WOWO's MOR drift on historyofwowo.com. One aircheck (since taken down, because the audio quality was pretty bad) of John Cigna from the summer of 1966 talks about a weekly album giveaway for his Saturday night "Lucky Dozen" feature, which was basically a listener takeover hour, and the album was the Stones' "Aftermath". Also, there's a weekly music survey posted from late 1967 where "People Are Strange" by The Doors is in the top 5. Contrast that with an aircheck from their then-afternoon guy, Don Chevillet, in early '68 where he plays a stiff from Sally Field and some other MOR stuff. Looking at the music charts around that time, however, you can see why WOWO would double down on MOR, with #1 songs from Herb Alpert, Paul Mauriat, Bobby Goldsboro, and others...I can remember Ed Ames, Steve & Eydie, and Frankie Laine in heavy rotation around that time.