"You and the others performing in this concert did a really nice job.  It was a pleasure to hear your music."

 

"Excellent concert!"

 

"It was a really pleasant way to spend a part of my afternoon--lovely sound you all made!  Glad we made it back a day early!"

 

"We did indeed thoroughly enjoy it.  So fun to have you doing a solo too.  It was a lovely way to bring a badly over-scheduled day to a beautiful close."

 

"Thanks for inviting me!  I thoroughly enjoyed it.  It was wonderful."