Leah Hochbaum Rosner

Finding a roommate would be so much easier if only baggage-laden people came with giant light-up signs above their heads: "Don't pick me! I will use your living room to host nightly EDM parties!" Or, "I'm allergic to paying rent!"

Alas, such signs don't exist. But there are ways to suss out if a potential roommate—whether a buddy from college or a virtual stranger off Craigslist—is bad news. 

Available vacant or fully furnished at the newly reduced price of $2,800 a month, this one-bedroom Upper West Side co-op has a good sized bedroom, southern views, ample closet space and a kitchen with hardwood floors.