Gazing at the blank faces, and Elizabeth knew she'd be asked any number of inane questions by her geriatric audience: Elizabeth's average reader was almost 90. Some of tonight's audience had even been ferried in from a dememntia clinic. Writers like Elizabeth were above this, surely?
Suddenly, she had a brainwave: she got up and left.
Sure enough, none of the audience even noticed, but everyone had an enjoyable evening.