You should go to the "dollar" car wash. I pay 1.75 for 7 minutes. Theres a knob and about six options. I only use two: high pressure rinse, bubble brush, then high pressure rinse, done in 6 minutes.
You get a good workout and save over 3 bucks. I get a wash once a month, so i save 36 bucks a year and burn like 1200 calories a year from it. I used to be lazy and go get ripped off through the machine, but not no more.