Kansas City added a single light rail line through downtown and made it, initially, free.

It has been so wildly popular, bringing happy Kansas Citians to the restaurants and clubs downtown that the business owners begged KC to keep it free.

Still free and I believe they are extending it.

I would love to see K.C. bring back some of the jazz nightlife that once charged downtown. (Though it might have been the availability of liquor there during Prohibition too.)

All I see in this thread are people saying it won't work and then people giving examples of it actually working quite well. The scientific method is telling us something here...