I've experienced performing a speech choir before and I must say that practicing and the actual performance are the most fun times in them.
We tend to be not really serious a lot of times in the practice and end up all laughing. This is actually frustrating cause you are not progressing but fun also to alleviate boredom and stress.
The actual performance is also fun because it's really exciting. Your heart will pound fast due to excitement, fear, anticipation, adrenaline, etc. You do your best like it's the end of the world while not caring about the audience that see. It was fun, really.
what role are even talking about? please elaborate