How do I invite someone to join my Facebook Room on my iPhone / iPad?

Facebook’s new Rooms app for iOS devices allows you to create and customize “Rooms” with different topics, and invite other people to comment and share images about that specific topic. Users can choose to make their Room either public or private by tapping the gear icon in the top right hand corner to access the “Permissions” panel. If you choose to make your room private, or want to personally invite someone to join your public Room, you will have to send an invite. Here’s how: