Here is my idea for the calendar:

Have just random shots of IA members cars and members. It doesn't necessarily have to be the owners. One shot could be an overhead shot of several randomly parked IA cars with some members scattered around. Another could be a "headlight-high" shot taken down a row of parked cars(as if you were taking a pic of a line of cars) just the front ends. This way, it gives a lot of IA members to be involved, wether it's their car, the females or the members themselves. Later, QD.