The Farm Soho is a huge co working space with numerous facilities like nap room, filtered water, plugs everywhere, coffee, tea and incredible Wi-Fi speed up to. They have variety of desks and even rent conference room. Its popular among start ups 300mbps. it cost around $20 for a day.
T-Mobile has good offers for tourist sims and they have a very friendly, supportive and professional staff.
Ace Hotel New York has a great lobby with ample seating and outlets for chargers and offers free wifi. They also have a Stumptown Coffee shop.
Near Madison square park, has a great community of small startups and freelancers. Open office space with conference rooms, a kitchen and a rooftop to hangout. Their startup events are great to attend.
Nyc, expensive but amazing city. To find best coffee shops to work remotely, have a look my article: http://www.bedrettingurcan.com/top-5-coffee-shops-to-work-study-in-nyc/
high internet speed. clean city. friendly people.