HowTo join with Pidgin:
1. You need a jabber account (e.g. from jabber.org, gmail.com, gmx.de, ...) which is configured in Pidgin (it's called XMPP or Google Talk in the account settings)
2. Open "Buddies -> Add chat"
3. Then chose your jabber account from the list
4. Click on room list
5. Then enter the conference server: chat.meticul.eu
6. After that you can add the "salix" chat room to your buddy list