The professor wore the required shirt and shoes. He expected service.
The girl behind the counter gaped at him, her mouth a perfect O. The professor set down a bottle. “It’s all in your imagination,” he told her. True enough. What could she see beyond the counter-top? A man in bifocals and a wrinkled shirt. “Let’s get on with it.” He pulled a bill from his shirt pocket, and unfurled it beside the register.
She rang him up.
I wrote this story for the 100 Word Challenge #336 at Velvet Verbosity.