Feline Flash Mob

Start by finding a long street in a residential area where many people own cats. Choose your time of day.

On day one, buy a smoked mackerel and take it to one end of your chosen road at the allotted time. Open it and eat it. With luck the smell will attract a cat or two; if so, feed them tidbits of fish.

Repeat on day two. Open your fish in the same place, but take a couple of steps along the road before eating it.

On day three, take four steps. On day four, take six steps. Continue advancing steadily down the road day by day, remembering to feed tidbits to any cats you encounter. They'll soon learn to come back for more at the same time the next day, and as you proceed they'll end up following you further and further.

By the time you get to the far end of the road you should have accumulated a sizeable following of cats, which will probably continue to appear for some time after you stop turning up.

For extra effect, arrange for several people to do this, all converging on the same junction.