It would only be worth it if people actually moved out of the way. Imagine a 10 minute ride from Dongsishitiao to Chaoyang Yiyuan at 7pm on a Friday night. What a dream! You could pretend that all six of your friends were very concerned and must travel with you... and you'd get a bed, too.
Sounds like luxuary. A taxi couldn't even be stuffed with four people, free rides for friends!