When I was at the encino velodrome for the messenger track races they mentioned that wednesday was their beginner night. I think it was about $7 to ride, and another 5 or so to rent a bike. It seemed a bit more casual than i would imagine ADT to be. I think, and this is my plan, I would like to take the 4 day class at ADT, but I would like to get comfortable riding at encino where it seems that people would be a little more accepting of beginners. I could be totally off-base on this. Its just my initial impression.