I'm going to play smash bros at an unofficial recital
Why would you play a game during a recital?
I'm tired of doing the same recital  in school, I want to play the game instead.
It's understandable to want to express yourself, but its rude to not play the appropriate material at functions that aren't supportive of it. People there are expecting certain performances and should be forced to watch something they aren't interested in.
No. I'm gonna play what I want and if people don't like it they can leave
But they have expected you to perform on that recital and you're going to disappoint a lot of people if you just play your game and not the proper performance. If you really don't want to do recitals anymore, you can quit the recital team and probably just go with a video game group instead.