If you’re looking to add a co-host on Facebook events, there are a few things you need to keep in mind. First, make sure that your event is open to everyone. If it’s not, you’ll need to find someone who is willing to help out and make sure that all the details are in place. Next, make sure that your event has a clear start and end time. This will help people know what they need to do in order to join in on the fun. Finally, make sure that everyone who is interested in participating is aware of the event and has access to the information needed to join in.