Ten non touristy (?) Things to do in New York City in 24 hours

Time magazine recently posted a list about ten non touristy things to do in New York City in 24 hours..

http://www.time.com/time/travel/cityguide/article/0,31489,1843404,00.html

This list is a bit confused I think for it includes a West Village stroll, the Empire State Building visit and even Grand Central Terminal all of which I think would figure on a regular tourist's list.

Should we add some locations to this post? I would include taking in a concert or a film at the Brooklyn Academy of Music to the list as well as a visit to Little India/ Flushing or even Little Egypt in Queens to the list.