I know Uber/Lyft pool is in Denver because I get the pickup pings. But as a pax, I have yet to figure out how to order one. I've tried on Lyft and Uber so I can experience it from a pax perspective. Not only that, today I am sans car while my car is at the dealership getting it's tune up. no where could I request pool. Is it only offered during certain hours? I'm asking from a pax perspective so I can get the cheaper rides (and of course I over tip being a driver) but also curious from a driver perspective so I can avoid them. Anyone got a clue how it works?