Feet rarely touch the ground at Cafe Sin Fronteras, where the seats of choice are cloth swings that dangle from the ceiling at this student-heavy hangout spot inside the University Library. The menu of hearty Spanish sandwiches and tortillas will barely cost the change in your pocket, and it feels deliciously naughty to order a Ciechan or Lwowek at the library. There’s a tiny coffin-sized smoking cabinet for those dying for a puff - - which appears to be nearly everyone - - and there’s no guilt in lingering over food and books here.