Taxi service was often discriminatory in NYC and other cities: taxi drivers often refuse to pick up black passengers assuming they won't pay once they reach their destination and I've had gay friends openly complain about how SF cab drivers used to throw them out on Pride or after a PDA with their significant other. This was the status quo for decades because of the barriers to entry of municipal taxi services' monopoly. They never had to anything about it since their was no competition and if you didn't like it, you probably shouldn't take a cab.
Besides Uber's barriers to entry are it's scale (low prices and reliable service) and brand than de facto monopoly status (which I assume is what you're talking about since you mostly talk about competition beside summing up your link). The fact that a co-op could potentially "disrupt Uber" is evidence of that.