Brooklyn Ink has a post detailing the travails of one tenant forced out of 112 North 6th Street.
According to the article, the building has no sprinkler system (which I believe is required for a transient hotel use) and, with the exception of the ZIP112 hostel space, no second means of egress. But even with their second means of egress, ZIP112 is probably not legal:
“The building is commercially zoned,” [DOB spokesperson] Fitzgibbons said in a recent phone interview. “If the hostel is still in operation, then it’s illegal.”
OK, maybe not probably.