Silent, invisible, dexterous and deadly. But nowadays alas, many Ninjas are finding themselves on the dole-queues with nothing to do. Ruthless daimyo's simply don't call for the services of your average ninja any more, and the more modern, urban ninjas are equally under-employed.

How about utilising this surplus of talent to assist the inebriated in bars, whilst creaming off a tidy profit? A nudge of an elbow just before it slips off the bar to preserve the upright stance and dignity of the nudgee, a gentle guiding arm to stop a pint being spilled needlessly, or a carefully honed set of manoeuvres to steer someone safely to the gents (or the ladies) without getting in anyone else’s way.

In short, how about a chain of bars, in which are employed an army of ninjas, all of whom are tasked to invisibly correct the collapsing motor functions of the horribly drunk.