I applied through living social. the original I think is 60 annual fee and 25 application fee. I got it only 19 bucks through living social.
I think they have BMW 328, Ford Escape, Audi A3, Volvo S 40, and Mini.
I also may try hybrid and toyota tacoma trucks. It is all due on availability at the moment.
you can check their website www.zipcar.com
Chicago has another car sharing called I Go, but I don't like their cars.