Compact Smart Cars zipping around the District are becoming a common sight as D.C.’s newest car-sharing service catches on.

More than 8,500 D.C. drivers signed up for membership in Car2Go‘s first 100 days of operation in D.C. — making the District the fastest-growing city in North America for the company, which offers 38-cents-per-minute rental of the tech-savvy cars. Members can find the cars on their smartphones, and pick them up, take them wherever and drop them off at any legal parking space inside the District — and gas is included. The company now has 300 Smart Cars — and only Smart Cars — roaming D.C. streets.