Sirius XM - channel 7 for the 70's, 8 for the 80's.
Usually we just plug in the iPhone or my phone and listen to our playlists on random.
More frequently, Sirius channel 148, the old time radio shows - X Minus One, the westerns like Gunsmoke, Johnny Dollar, Fibber McGee and Molly, Jack Benny, Our Miss Brooks, and my favorite the Great Gildersleeve.
Yes, I am probably odd, someone who did not grow up with the shows, but likes them anyway.