When I sang in choirs, we were asked by the director to smile as we sang. I lifts the mood of the audience and of the singers. You also look involved and are connecting with others. When you seem to be having a good time, the audience tends to have a good time.
I like to banter a little with the audience when I perform with a friend or a uke club. If you're having a good time, the audience is with you and you can make flubs and even forget a verse and they don't really care. But if you look like it's a pain for you to be there. And you care more about the mechanics of playing the song than entertaining the people listening, they will dismiss you and walk away without a second glance.
At least that's been my experience.
I like to banter a little with the audience when I perform with a friend or a uke club. If you're having a good time, the audience is with you and you can make flubs and even forget a verse and they don't really care. But if you look like it's a pain for you to be there. And you care more about the mechanics of playing the song than entertaining the people listening, they will dismiss you and walk away without a second glance.
At least that's been my experience.