Hold music
Color me easily amused - I was on the phone today handing off one of our customers to the support organization of one of our third party tool vendors and ran into something interest - you got to pick from six music options while you were on hold. “Press one for easy listening, press two for rock...” the sixth option was no music.
Also, you could change your genre choice while you were waiting. What’s next? “Press # to advance to the next track...