Well, it is all programmed for this occasion, correct? Short of the creators of this place creating a number of individual pieces for their virtual band to play, there really is no option other than repeating parts of a song so that it loops back on itself and thus never has to end.

[he pauses for a moment, listening carefully as if considering the sounds, and eventually an easy grin slides onto his face.]

Given those constraints, I think it still manages to be enjoyable.