On January 7, 2012, Beyoncé gave birth to her first child, a daughter, Blue Ivy Carter, at Lenox Hill Hospital in New York. Five months later, she performed for four nights at <answer>Revel Atlantic City's Ovation Hall</answer> to celebrate the resort's opening, her first performances since giving birth to Blue Ivy.
Her first appearance performing since giving birth was where?
Revel Atlantic City's Ovation Hall