As I have data on stations per format, I have to disagree.
For reference, go to As I have data on stations per format, I have to disagree.
Go to
http://www.davidgleason.com/Broadcasting_Individual_Issues_Guide.htm and scroll down to the end of the 1967 listings for Broadcasting Magazine and click on the FM Growth special supplement of Broadcasting Magazine from mid-1967 and look at how the medium developed in that crucial year.
One thing happened late in the decade which totally changed FM (and which, 10 years later had caused the loss of half of the AM audience) and that was the FCC mandate ending all but a few waivered simulcasts by daytimers and special cases effective the start of 1967. This had the effect of making owners look for new formats that would not hurt the cash machine that was the AM. We got oldies formats starting in about 1968 including Drake Chennault's "Hit Parade" lite Top 40 with gold product. There were hundreds of free-form rockers, and by the end of the 60's we had some successful Top 40 stations like WPGC in Washington which switched the focus from its daytime AM to the FM.
So, during 1967 we saw hundreds and hundreds of stations picking up new formats, ony a few of which were some form of what had been called Easy Listening and which became the more structured, almost always syndicated, Beautiful Music format. We even had FM country in LA on KGBS, as well as the levgendary KMET, Sol Levine's jazz station and quite a variety of other formats.
Even at the beginning of the decade, I recal on major market (it was around 10th in rank then) had one classical, two multi ethnic (multiple foreign language or bilingual shows), one jazz, several MOR vocal based formats (which would eveolve into AC at some point) and, of course, a couple of easy listening stations. There were no smooth jazz stations that I recall, anywhere (the term was coined in the late 80's for the Smooth Jazz station in Chicago, by the way) and most jazz stations played the big names like Ornette Colemen, Thelonius Monk, Dizzy, etc., who could hardly be called smooth. Heck, even most Brubeck was not "smooth" by the definition of that word used in radio.
I also worked briefly in te DC market in '69, and despite several Beautiful Music stations, we had an all oldies outlet, a Spanish language FM and a variety of other things that were not Beautiful music or relatives of Beautiful, including Progressive rock and the first steps towards what would be AOR, as well as very well done WPGC-FM with high energy Top 40.