This has not been our experience on any of the 12 Princess cruises we have taken. I don't know if the announcement you referred to is over the PA system or in the Patter, but we have never once encountered either type.
We are familiar with the Wheelhouse Bar and typically enjoy a pre-dinner cocktail there. However, on our last two cruises, both on Grand class ships, Ruby and Sapphire, the music in there was so undanceable that requesting anything seemed pointless.