Sliding through mud/ Under the log are just the names of the rooms. The mud rooms seems to be the room where most seem to meet. If you click on the tab , you'll be in the room and able to chat. Each room has a number that should indicate the number of people there. However, if the 'x' button is not clicked when you leave...you appear to still be there. You can chat one-to-one by hovering over the persons name, this will give you the option to 'private chat' - no one else will be able to see the conversation.