I-Go is running a promotion now thru 7/31 that's a really great deal. Join for just $25 and get a $25 credit for free driving. To take advantage of this offer, just enter the promo code HOT FOR IGO in the Promotions section of the online application form. The $25 driving credit must be used within 30 days of joining.
There are many I-Go locations in Rogers Park, Evanston, and Edgewater. If you currently own a car that spends most of its time parked, costing you $$ for monthly parking or tickets and damage from on-street parking, car sharing could save you $$$.
It's a very viable option for many in RP. Four years ago, I-Go added its first location in RP. Now there are more than 3 dozen cars available within a few miles, all in locations convenient to public transit.
If you only need a car for errands or social occasions, don't need one all day, and can plan ahead, car sharing can offer a very affordable alternative to owning, maintaining and insuring a car. I donated my car last year, and have used my bike, public transit and car sharing since then. It could be an option for you.