Broadway, New York

An obvious and simple code of conduct, but one that's often ignored. Make sure to switch your phone - nothing's more annoying than bleeping in the middle of Mamma Mia!, for performers and fellow audience members alike.

If you've observed the first rule, this will be no problem. But a bright phone screen in the audience is distracting for the performers and the audience, and any photos you try to take will likely be of poor quality due to lighting and distance, so keep it off.

Don't feel that you have to put on your best dress to be allowed into the theater. But if you want to make an event of it, then why not dress up?

Sure, quietly eating a few M&M's isn't going to bother anyone, but just be aware of rustling packets and loud chomping or you might get an unfriendly nudge from your neighbor.

Everyone's paid a lot to see the show - especially a multi-award-winner like The Lion King, so try not to hog all the space around you.