Club Plugin

Hi all,
Hope you can help.

I run a local club and we want to build a new website. One thing I’m really keen on doing is having a private log in section where people can leave messages, like a message board or a even a forum, but one where you can’t see any messages unless you log in.

One other slightly tougher thing I’m looking for is a means of creating an event and sending it to all the members, ideally it would have a way of them saying yes or no to attending the event.

Does anybody know of any themes or plug ins?

Cheers,