He jumped suddenly and looked quickly away. She’d been watching him in the mirror behind the bar. He must look a right perv.
Later, when he nonchalantly glanced back she waved in the mirror. Was that aimed at him?
He looked again. This time she picked up her empty glass and waved it in the air, smiling at him all the while. It was aimed at him. He wandered over, ‘Can I buy you a drink?’