Welcome to Piano Society! How long and how difficult does the piece you're playing need to be? The "Tango" by Stravinsky is fun, and you might want to look into some of the works of Poulenc (I'm working on his Intermezzo in A for a recital, a 4-5 minute piece that's not very difficult; his Nocturnes and Three Novelettes are shorter pieces that are very interesting too). Bartok's Allegro Barbaro is a boisterous, impressive piece, fairly difficult but not very long. He has a lot of other pieces that fall into the latter category. Hopefully some of the other members here will have suggestions. Best of luck in your audition!