Let your friends know what you're up to in the News Feed. Click on a News Post and start a chatting about it.
Find a nearby ChatRoom and connect with the people around you. Click on another user to send them a direct message to make new friends.
Access your friends list, and talk to eachother when you are no longer nearby. Block people who are bothering you. You will no longer be notified when they message you, and they will not be able to see your News Posts