IRC is a huge cyber world. There is not just one channel for one topic, or one server you can connect to, and no one set of servers makes up one network, etc etc.
If you've been to a channel called #findscrim then the same channel could exist on 100 other networks too!
I suggest you use online resources such as
www.searchirc.com and
http://irc.netsplit.de/channels to find other channels out there that are related to counter strike, and "pugging" etc (sorry, no idea what that is, I'm not a CS player).
You can also use the
/list *search word* command, for example typing
/list *scrim* will come up with a list of channels with the word 'scrim' in.
Happy chattin'
Regards,