So Mark just mentioned the fact that he didn't know that you can have private messages with multi users. A really cool feature of this I was thinking will allow you to create a private group for games notifications. For example if I am having regular games at my place I can create a Private discussion and in any of my games posts you can ask if users would like notification of your games. You can add these users to your private discussion. You would post the game on the public forum and then post a link to this post in your private group. Reason being some users are not on the forum all the time so this will allow you to let them know that you just posted a game go check it out!! Basically a private channel with only users that you invite. I suggest you ask users not to post in there as everyone in the discission will get a ping. the group is only to be used for you to announce your games.
Just a cool way to make a notification group for new games and at the top you can have your address as people added later can see the history of the entire private chat.
Just some ideas for hosts!