I don't remember anything on WLS other than top 40. WFMT had, and still has, The Midnight Special. It is on Saturday nights. Now it starts at 9, but then it would have been on after the 10 pm news cast. There may have been a special show on WLS in the early '60's and I wouldn't have known about it, as I was in 2nd or 3rd grade at the time. But the folks would let us stay up late to hear the Midnight Special on Saturdays (a last corrupting influence).