Non-dancers are welcome to sit at any one of the tables that ring the dance floor, order a bottle of wine and observe the throngs of couples tangoing.

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Or an associate on the stock floor will use a mobile device to ring up a sale.

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He buzzes for a flunky, who spares his boss the indignity of picking up the pink ring binders piled on the floor.

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They're having a cocktail party on the floor of the New York Stock Exchange Thursday night, and then Steinhardt and others will ring the opening bell the next morning.

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ATLANTA, Georgia (CNN) -- When teacher Karen Myhre fell to the floor after taking attendance one morning, her third-graders knew exactly what to do: Ring the bell to alert the school office, and run to get the school nurse.

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