Hi BabyP,
There are chatrooms on Greekchat.com that used to be used way back when but that stopped because Greek nationals used to come in and harass members and try to stage coups (or however it's spelt)

. After that, people chatted on AIM and stuff.
Currently some people do use the chatrooms on here, I think DST does have scheduled chats? But AFAIK they aren't used by those who spend most of their time in the general forums.
I've been in a few GC chats (in a chatroom) on AIM a coupla times, they're... interesting things.
Haven't been in one for a LONG time though so they may not be going on so much or perhaps I don't get invited ha-ha

.
I talk to people from here on AIM itself tho, a couple last night.
Here's two threads you might find useful:[list=1][*]
GreekChatters AIM list - list of AIM names (fairly up to date, PM me with changes); also always easily locatable in ChitChat by going to bottom of page where search forum option is and typing in: Greekchatters.
[*]
A Scheduled Chats thread, though I don't know if it ended up being used much.[/list=1]Hope that helps?
...decadence