NEW YORK - At 10:15 last Thursday night, most stores along Park Avenue were locked and shuttered. But Bernie was doing his best business of the day.

The self-appointed doorman at a Citibank branch had just coaxed "tips" from three consecutive ATM customers. One emptied her change purse - $1.48 in all - into Bernie's outstretched coffee cup before nervous hailing a cab.

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