Cindy,

To join a particular chatroom:

At the top of the page you will see it says "Room" and next to it is a drop-down menu. From there, you can select which room you'd like to join.

When you look at the room listings to the right side, it will show you how many members are in each room, and by clicking the room name - it will show who is in the chatroom as well.

Hopefully that was what you meant. To join the chatroom, you can use this link:

http://forums.braintalk2.org/chat/flashchat.php

Or using the menu above on the forums here, click "Chat Rooms".