101.9 F in my area has a "Love and Dedication Show" on week nights I think Monday thru Thursday or Monday thru Friday. ...They don't do it right now because of Christmas music 24/7, BUT for the rest of the year, the DJ, her name is Fran takes requests, and plays almost anything. They pull songs out of no where that I never heard on there. I think her show would be an exception to the general 400 to 500 songs that they routinely play, BUT you will often hear a lot of the regular format songs because that is what their listeners are used to. For instance many people will request "Girls Like You" by Maroon 5 even though that song is probably played every other hour every single day on that station right now.
I only listen to her station because in my around town beater car 2002 Mitsubishi Lancer, I only have regular radio. In my Traverse when I'm on vacation or driving to/from DJ gigs, I have XM Radio on all the time.