Urban celery?

I've got visions of a dark cyberpunk future, a dark sky visibile between looming ill-lit buildings, flickering neon signs advertising any vice people will pay for. One of them is a bright green depiction of a stick of celery. Desperate addicts crowd the vendor, spending money they can't afford, coming away clutching just one more stick to feed their pitiful need.

... and in the next street, the dealer's slightly more upmarket competitor lurks a bit more discreetly behind a grubby door. His clients, glancing guiltily up and down the street before opening the door, are the respectable-looking ones, the well-off cel^Wsalarymen. They need to be more secretive about their habit, since they know their jobs are on the line if it comes to the crunch.

Ahem.

*wince*