Minecraft is as totally relevant to NaNoWriMo as having write-ins in coffee shops. Okay so it's not... entirely, but it's still relevant... somewhat.
Biggest reason I never attend write-ins is that they're always in some place called "Artsy Café", "Café Foreign Word", "Owner's Name's Coffee", "Adjective Noun House of Coffee/Coffee House", "Name that has nothing to do with coffee but is a coffee place that is aimed at a particular group of people but is open to everyone but they would not think to go here because it doesn't sound like a place they would go to". Certainly, they're quite suitable places (wi-fi, food/drink, open late, etc.), but mainly, I just don't like to be around people who hang out at coffee places to write.