unfortunately there isn't any grip tracks around here. the only "close" track is a drag track. every now and then there'll be a company that'll rent out a huge parking lot and set it up for autocross but that's about it. from what i'm seeing there are alot of "drifting" type people on this site, just search around in the Upcoming Events section.
NJMP is the closest Road Course track.
http://www.njmotorsportspark.com/