Hmm, sounds like "Happy Birthday," but it could be copyright infringement, and hotels might have something to worry about, according to this article by Jim Abrams.
The possibility of a copyright infringement, if any, arises where the copyrighted music is publicly performed without permission of the copyright owner, regardless of whether the music is performed by live musicians in the establishment, by wired music, by record player or tape recorder, or by other mechanical means.
We're talking jukeboxes, private parties, rebroadcasts, even in-room movies...I can hear the lawyers sharpening their pencils as we speak. (And yes, "Happy Birthday" is copyrighted. Don't tell your four-year-old.)