By just sharing a link, you can communicate with any number of people quickly.
Event and Locale Community
Create any channel name you want to create an instant chat room. At a Concert? type in the name of the band to see if people in the ausdience are talking about it. Bored in class? Create a chat room to talk to the other students in the class. Own a coffee shop or restaurant? Encourage your patrons to sign on to see live updates of deals, or special promotions, or even to play trivia games.
Be Public, Stay Private.
You don't have to share your personal information to chat with someone online, you just share the URL.