Hi there.
I see there's no need to inform you that sanity is best left behind when entering these parts
.
There are a couple of steam groups you should know of,
the community group and
the group for those who like to shoot those filthy clanners! With regards to playing TF2 we usually fill the server on Fridays. Incidentally this Friday happens to be a themed night (first Friday of every month) where we often change our names to suit the theme (have we decided for this week yet?).
We do sometimes hop on at other times during the week as well.
As for other games, well there's
this thread and there's Llama nights on Sunday where we play a game voted for by the community. I'm sure if you poke around the forums you'll find other people playing other games as well.