The Chat Host/Leader is not a bingo player, but a paid employee of the site. When you enter a bingo site and the game loads on your computer, a chat area loads as well. This is a box that you can type words in and introduce yourself to other people playing the bingo games. The Chat Host/Leader should welcome you to the game and answer any questions you have in regards to how to play.
You will find that you can make friends playing online bingo just as easily as you can by going out to a Bingo Hall. The chat area allows players to congratulate winners and talk about different things during the bingo games. Regular players exchange e-mail and pictures, so you can put faces to who you are chatting with. s