I love a lot of the “easy listening” my parents enjoyed. For example: Calcutta by Lawrence Welk, Winchester Cathedral, Herb Alpert & the Tijuana Brass, Glen Campbell, Bobby Vinton, Theme from A Summer Place by Percy Faith, pre-rock Streisand, etc.
Anything by Creedence Clearwater Revival. My dad used to listen to them relentlessly, and I always hated it. Now I don't mind them so much since I'm more into classic rock.