I also want to add a few things of my own...
1. Chat rooms are not for everyone. Chat rooms require everyone to act and be respectful of one another and the space they may be in. Some people may react badly if they go into a chat room and find they are talked to in a way they weren't ready or expecting. So please be aware that there are real live human beings, sometimes in pain or confusion, behind those user names. Please be generous and caring in your behavior in the rooms at all times.
2. If you find yourself starting to engage in a "serious" conversation one on one with another user, consider moving to private chat with that user. Anybody is able to setup their own private chat room on the system at any time. Use these rooms to hang out with friends or engage in that longer-term serious conversation with another member, without being bothered by other members. If you hang out in a public room with others, sometimes you may be expected to say something or asked a question. And if you hang out in a public room instead of creating your own private room, be aware that it is a PUBLIC room and anybody can and is welcomed to access it at anytime.
It is virtually never appropriate to ask another member to leave a room (unless you're a member of the community team enforcing a guideline). Ignore a member you don't like, or move to a private room. Every person who enters chat is responsible for maintaining their own safety and security by using the tools we've made available to you.
Thanks and enjoy!
DocJohn