I love how I walk around the city and bump into so many musicians. It's nice to see them rocking in the street and stopping busy New Yorkers from walking.
The print graphic designer´s heaven. All sorts, sizes and weights of paper, shaped in forms i have not seen before (jup you don´t get that in Austria). Packaging material, adhesive letters and everything else you just want to have. Find all sorts of pens and versions of Moleskines. If you like childrens books and/or illustration, also check out the great store on the other side of the street (Cupcake Café).
The best underground shows you will find will have free pbr and models as far as the eye can see. They are rarely announced, so keep your eyes out for promising openings, especially with Milk Underground coming up.