Sick, this got a lot of interest so I guess we'll go ahead with it.
So the two things we need to consider is the date of the first night, and what we're going to play. All of the games that were mentioned twice or more (thus suggesting a decent amount of interest in them) are as follows;
Personally I would prefer CAH or Minecraft because they're simple games you can play for however long and then you can be done when you want to be done. I suppose the same could be said for GMod but I wasn't much of a fan when I played it, but if that's what we vote for I don't mind playing it again.
Here's a strawpoll so we can vote on them. Went with Strawpoll because I don't think you can create multiple polls in the same topic and this lets us keep one topic forever. You can make multiple votes so you can vote for everything you're interested in playing.
And then what night would people prefer? I'm open to any night because I'm a no life so what works best for everyone else?