New York with 120 euro per day excluding hotel: is it still possible?

I already have flight and accommodation for a week in Brooklyn. I would like to keep an average budget of 120 euros per day for transport, meals and activities, alternating museums to neighborhoods and walks. I don't care to dine in elegant restaurants, but I don't even live just fast food. Between tips, unexposed taxes and ticket prices I fear to substimate everything. What expenses surprise more and where should you book? I'm interested. above all a comparison based on recent experiences: indicated travel period…