If you're walking through Grand Central, head over to Vanderbilt Hall (across from the information booth, up the ramp) where the MTA's Music Under New York auditions are being held. Seventy musicians are auditioning today for 20 spots to win lifelong permission to perform in the subway. The Post has some sketches of a few of the 100 musicians already in the program - they can make up to $50 a hour.
The auditions are from 9AM-12PM and then 1-4:30PM. Here are the official Music Under New York performance locations.