AMC Theatres has plans to implement changes at several of its theaters in the U.S. and in Europe over the next few years that will affect audience members’ movie-going experiences.

Can you sing along to “Wicked” show tunes in a movie theater? Ahead of the big-screen debut, die-hard fans of the musical are debating movie theater etiquette online.

Break out your best pink ensemble. Paint yourself green. But resist the urge to make watching the film adaptation of the Broadway musical a sing-a-long — at least at AMC Theatres. Singing is on the list of no-nos for guests in the theater, according to ...