When you create the event, you can choose if it’s open to the public or if people should contact the organizer prior to the event. If you are going to hold the event in a public place (bookstore, coffee shop, library, etc) we recommend that you choose the first option. If you’re going to host the event in your place, it would be better if you privately contact those who plan to attend and send them your address. Keep in mind that all the information you post when you create an event will be visible to other people.