My friends spent years bootstrapping and maintaining a local hackerspace.
Most of their problems could be traced back to people trying to live at the hackerspace. 95% of people were trying to use it as a hackerspace, but 5% saw it as an opportunity to do some combination of sleep, shower, eat, and relax among interesting people for significantly less than it would cost to rent somewhere. It gets even harder when the person in question is friends with so-and-so, who will try to defend having them live at the space while they're down on their luck.
I was never heavily involved with the space, but having watched their struggles I would agree: Nobody lives there, nobody stays overnight, no exceptions. Maintain a hard line against this and enforce it early.