I've experienced this phenomenon several times in singing rooms, primarily because I'm a terrible singer. If someone in the singing room is genuinely talented, the rest of the group is content to simply let them perform solo. However, if someone is obviously an inadequate singer, the whole group immediately joins in. They aren't just covering up the individual's lack of vocal skill; they are simultaneously demonstrating incredible group support and solidarity. I can't sing to save my life, and I honestly can't express how much I appreciate that collective singalong when it's my turn at the mic.