I'm considering going to the MIR track rental on 12/5. It's all day 1/4 mile racing, working on your time type stuff. It's a rental so its not going to be crowded and should be able to get a lot of runs in. $100 to go, $10 for spectators.
If another Z4M is going, I'll be there. It always makes things way more fun when there's competition
Official thread:
http://www.e90post.com/forums/showthread.php?t=318684