Are You A One Spacer Or A Two Spacer?

This is totally random but it blew up on my Facebook feed yesterday.  It boggles my mind so I have to get input from you.

One of my friends had posted an article on his Facebook page called Space Invaders.  Basically, the entire article is a rant (albeit a sarcastic one) on how using two spaces after the end of a sentence makes you look like an idiot.

I couldn't believe that I had never heard this throughout high school and six years of college. Seriously?  According to the article, typographers are of the belief that only one space is to be used after the period but MLA says two is right on.  I asked a couple people in the building, including our Digital editor, and everyone says they use two spaces.

This blows my mind but I'm a two spacer and that's how I'm going to stay.

What about you?  Are you a one spacer or two spacer?