Pedal Pub Pulls: Science Fiction Invention

They pedaled through the streets, hooked up to the sippy cups of alcohol. They would have swerved and swayed all over the place, but the person at the head of the train, the one in charge of steering, was sober. That was the rule. Eventually, 1 or 2 of them would stagger off to their homes, and a new person would hop on, eager to get a free drink for the simple exercise of moving their legs. The cargo they pulled would get to its destination, powered and pulled by nearly-free labor--the bikers were hardly drinking 150-year aged scotch. Nope, though some pedal pub pulls had become more competitive in an effort to chase out their competition and keep the strong pedalers for themselves. There were--

Inspiration: "Pedal pubs," briefly mentioned on MPR as being something that the Republican National Convention will bring more of.
Story Potential: Low.
Notes: Well, this isn't an actual story idea, but it is a fun riff.