Student Male seeks a room

I'm a 23 year old straight, rather handsome student, who's looking for a room at $600 under. Dont drink smoke or do drugs, and I maintain a healthy lifestyle. I don't spend that much time at home except for sleeping and eating. I do deliveries via bike messenger and study math on the side. I'm extremely affable and easy to get along with, and have an interest in just about anything. Not very picky on places or bathrooms and such as long as the place is reasonably intact.
Ideally I'd like Harlem, Inwood/Washington heights, sunset park, park slope, Williamsburg, greenpoint, BayRidge or anywhere that lets me get to my job the quickest.