You can check out www.bbkingblues.com
and see who is playing there the time you are in NYC, also Greenwich Village area are a lot of clubs you can check out.
There is a free magazine you can pick up in some stores where all the action is in around town.
Sorry I forgot the name of the magazine.
Also what I would do check out the Imax on Lincoln square, if they have a good movie there at that time go and see it.
That Imax is huge, I loved it.