DO: Have fun with your group.
DON'T: Push your group too far.
I really enjoy listening to many of my favorite songs being sung a cappella. In some cases, I prefer the a cappella version to the original. I can only imagine the gratification groups get actually performing the music for an audience. That’s the way that it should be. It’s fun and active, and should be viewed as such.
Don’t get me wrong, there is a time and place for being serious, such as in competitions and special performances. But ultimately, you’re in the group because you enjoy singing and get to do something that you love.
There’s also a tremendous community to be found among the members of an a cappella group. Many, many of my friends who are alumni of groups still keep in touch with their old group-mates--inviting them to their weddings, and reconvening to sing over alumni weekends. You don’t want to miss out on these bonds by looking at every performance as a life or death situation.
Every group should strive to excel in performance, but it’s also essential that you take the time to breathe and have fun with what you’re doing and who you’re doing it with.