You can always make a post that you want to chat.
Some will post a notice in a few forums- like social, here in forum feedback and also their favorite forums.

If you have a special time in mind that works best for you post that too - and your time zone, that helps a lot for planning.

there are online time zone maps
here's one that you can set up with your own location and add in other settings & locations
http://www.aglobalworld.com/internat...time-zones.php