Add firstname.lastname@example.org as a contact (where '#' is any number from 0 to 9):
To start a new party chat, think of a partychat name and password and send them in a message:
/make mycoolgroup secretpassword
To invite your friends, give them the name and password.
To join an existing party chat, send this message:
/join mycoolgroup secretpassword
To leave a party chat (not that you'll ever want to), send this:
Generally you never want to /leave a partychat... that way you can continue receiving messages even after you've closed the window or logged out!