Gerald Arpino would have turned 100 in January. To mark the occasion, The Gerald Arpino Foundation tapped Joffrey Ballet alumni to revive Arpino works at The Joffrey, Ballet West, San Francisco Ballet, Complexions Contemporary Ballet, American Ballet Theatre, Oklahoma City Ballet, and Eugene Ballet, as well as at university dance programs throughout the country. Artists from those companies will convene at Chicago’s Auditorium Theatre September 23 and 24 for a centennial celebration, performing an all-Arpino program.