That's the case at Shands Hospital here in Gainesville:
https://www.youtube.com/watch?v=lmudpxbxcbkAt Shands there is a kind of "grand lobby" (only slightly visible in the above video), toward the center of the hospital, and the piano in the video above is off to one side of the lobby, often being played as people enter the lobby and walk by. And there is even another piano on the other side, also being played at times.
There isn't someone there playing them all the time, but fairly often when one enters the lobby, one does hear the lilting sounds of piano melodies, of all kinds, being played.
A nice welcome for visitors entering the hospital, and for resident staff and patients in the area as well.
It's part of an arrangement that Shands has with the nearby University of Florida Department of Music. Piano majors in the department get experience playing in a public setting, and the hospital benefits from their skilled and pleasant playing.
In fact Shands Hospital has a fairly well developed music-in-the-hospital program:
https://artsinmedicine.ufhealth.org/programs/hospital-programs/music/ as do a good many hospitals across the country, as a simple google search reveals.
And in some places around the country, not to be outdone, sometimes even hospital staff can be heard pounding the ivories:
https://www.youtube.com/watch?v=mpxn4gtxkve(long, X it out when you've seen enough).
And of course even rock bands can be heard sometimes when entering some hospital facilities:
https://www.bing.com/videos/search?q=hospital+rock+band+site%3awww.youtube.com&docid=607990154814620064&mid=356374fd3347b3eed79a356374fd3347b3eed79a&view=detail&form=vireNaturally, the venues for such musical performances have to be chosen carefully, with no rock bands playing in areas where patients need to be resting quietly, for example.
But many would agree that the sounds of a piano concerto or even a rock guitar riff echoing down the halls of some parts of a hospital where it's okay to do so, are an enjoyable experience for all.