WASHINGTON ( TheStreet) -- Nothing's for free, not even lunches at the White House. CEOs from Wal-Mart Stores ( WMT), Starbucks ( SBUX), Verizon ( VZ) and Nucor ( NUE), were asked to fork over their credit cards so the White House could charge them for a lunch they had with President Barack Obama on Friday, according to reports. Obama is being careful not to create a conflict of interest as he meets with these CEOs to figure out how to get the private sector back on solid footing. Last month the CEOs from Xerox ( XRX), Coca-Cola ( KO), AT&T ( T) and Honeywell ( HON) were also asked to pay for their own lunches at the Big House, Politico originally reported. These lunches use to be paid out of the taxpayer-funded entertainment budget. --Reported by Jeanine Poggi in New York.