Room for one month in manhattan, please

Just a basic room for almost a month in Manhattan, just booked the flights from the 17th of december until the 11th of january, i was in manhattan already 2 weeks ago but just fell in love with the city and wanted to stay longer there and see the xmas & nye etc. I am also moving to NYC on next fall to study psychology and neuroscience in either Columbia - or Fordham University. I'm really out going and social and love to meet new people. I don't drink or smoke anything and i train judo and muaythai aswell. So hopefully a little more social person for roommate would be nice. :)