Instead there is talk of sit-ins and flash mobs as well as the rally this weekend.

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Its original aim was to, in effect, create flash mobs at participating businesses which would offer a coupon for a short time, usually 24 hours.

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Commercialization is a part of the movement's evolution, says Ms. Lawrence, who says the company hires hundreds of dancers a year to participate in corporate flash mobs.

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Quicker than you can say "order up", those flash mobs turned into a cult, and the cult into a movement with gourmet trucks operated by chefs from up-and-comers to TV celebrities.

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The positive feelings people get when watching flash mobs are often "transferred to the brand responsible for creating the experience, " says Brad Haley, chief marketing officer of CKE Restaurants Inc.

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From flash mobs to the contagion of national uprisings that comprised the Arab Spring, it is clear from recent events that the transaction costs for mobilizing groups have shifted, thanks to ICTs.

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While Flash mobs -- sudden, unexpected and short-lived gatherings of members of the public, organized by Web sites and text messages -- usually tend towards the surreal (zombie mobs in Toronto, pillow fights in Buenos Aires) they have also been utilized by pressure groups.

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The show centers around flash mobs, the phenomenon when a bunch of seemingly random people in a public place suddenly start putting on a coordinated dance show. (For an example see a clip from Modern Family at the bottom of this post.) Fox will premier the show as a special on March 31st after American Idol.

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Requests to stage more mobs flooded in, says Staci Lawrence, co-founder of Flash Mob America.

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