Facebook on Monday opened a small business pop-up at nine Macy’s stores — in New York City; Pittsburgh; Atlanta; Fort Lauderdale, Florida; San Antonio; Las Vegas, Los Angeles, San Francisco and Seattle — as part of the department store’s The Market @ Macy’s. As part of that effort, which will be up through Feb. 2, Facebook is running an ad campaign that includes other brands that are also part of The Market @ Macy’s, according to an email to Retail Dive from Facebook. That includes signage at Grand Central Station in New York, promotions through its Facebook and Instagram platforms and in digital ads forged by Facebook’s Creative Shop.