Certain types of songs tend to have a call-and-response structure because? A. It is easy to remember and suitable for groups
B. It requires only one singer
C. Only very musical people can learn it
D. It can have many different sections

all-and-response begins with a melodic “phrase.” This is a group of notes that expresses a musical idea. The phrase can be purely vocal or can be played on an instrument. It can also be a mixture of the two. For example, B.B. King was known to make the call with his voice, and answer it with his guitar.

I'd say B since you'd emphasize the existing qualities, 120 sq ft is about a tiny house space or smaller, so it's pretty cozy. You could also counteract the existing moods to help. Think about designing the room altogether, and good luck!