Yossi Milo is, in my opinion, the most dynamic and eclectic of the photography galleries in NYC. From portaiture to architecture to experimental digital sculptural giant animals to street photography, they show an endlessly exciting range of work. Some of my favorite recent shows include Simen Johan's mythical beasts, Ezra Stoller's architectural photographs of the TWA terminal, and Sze Tsung Leong's huge cityscapes.
The best way to enjoy Manhattan is from Brooklyn. Transmitter Park offers views without the crowds, and you can pick up coffee-to-go and treats from nearby Ovenly. The India St/Greenpoint Ferry is a 5 minute walk and will take you all the way to the Rockaways in the Summertime.
Little skips is my place when I need to refill my energy with some morning sunlight. The big windows facing the street let all the light in while you can drink some coffee.
My favorite thing to eat is the grilled cheese sandwich with some avocado. Out of rush hours or weekend mornings, it's a pretty good space to take your laptop and get some work done.