Select one of your events
Near the top center of your event click on "Discussions"
You can chat with guests by entering your message in the bar at the bottom of your screen and hitting the send arrow on the right side of the bar.
You and your attendees can also upload photos as part of your discussion by clicking the photo icon on the left side of the send message bar.
You can follow the discussion feed in real-time.
Attendees will not receive emails or notifications about discussion updates but can view the discussion feed by selecting an Event and then selecting "Discussion" above the event.