attended one with the whole family; a very old friend of our family sung – among the best in fact.
Serious amateurs taught by an obviously good singer, likely good teacher do sing quite well – and their strengths are significant compared to an untrained singer.
Amazingly, our child has combined interest in music with readiness to assist an elderly friend to enjoy, actually, a show of mostly American jazz and pop music from the 50s through the 70s sung and attended by people 10 to 60 his eldest.