If you’ve never been privy to the theatre-audition process, you may not realize how intense and cut-throat an experience it can be, and as A Chorus Line – currently being presented at Quad City Music Guild’s Prospect Park Auditorium – teaches us, it’s not always about how talented you are; sometimes it’s merely who you know. But while that bias can be an unfortunate reality, Music Guild’s vast display of on-stage talent dazzles you into momentarily forgetting the injustice.