I second Katz's deli. Ride the Cyclone & Wonder Wheel at Coney Island (grab a Nathan's Hot Dog). Check out the East Village live scene (Cake Shop, Sidewalk Cafe etc) Loads of galleries, but less obvious ones are the Brooklyn Museum of Art, the Cloisters and the Folk Museum beside MOMA. One time I was there in summer, and it was unpleasantly clammy...had to stagger from one air conditioned coffee shop to the next. I know it's obvious, but don't miss the best freebies...Brooklyn Bridge & the Staten Island Ferry. There used to be plenty happening in Williamsburg, but spmewhere