Ok, here's the deal:
There's a place right by my house that has self-serv bays open 24/7. They also have automatics if you don't want to get out of the car, but I'm not sure if there are any machines touching the car (machines BAD). The water in the self serv is not heated. The cost is $1.50 for something like 4 minutes, and the guy I talked to said that it usually takes $3.00 to get your car clean.
So, my proposal is this: we can meet at my house about 1:30 or 2:00 which is the warmest part of the day, head over and wash our cars, then head back here and use my garage for whatever else (like testing 99REDSE's alternator) out of the wind and cold.
I'm located near the junction of I94 and College Ave. just south of the airport. If everyone is cool with this then I'll give more exact directions. And even if you're not planning on washing your car, come along just for the hell of it anyway.