Just because you aren't 13 anymore doesn't mean you still can't have sleepovers. But that being said, there is no reason to have your guests camp out in sleeping bags on the floor. Your friend's jokes may still be immature, but her bones certainly aren't.
This modern-style gray and black leather sofa by American Leather Co. features a removable back rest which converts the sofa to a bed.
86 in wide x 35 in deep x 33 in tall