For a busman's holiday, the chef cooked dinner at the beach house.
busman's holiday
idiomA holiday or vacation during which one does something similar to what one does as work.
Origin
disputed originFrom busman + -’s + holiday, from the idea that a bus driver, to go off on a holiday, would take an excursion by bus or go on a long drive and thereby engage in a similar activity to his work.
The teacher spent her summer break tutoring her niece, which felt like a busman's holiday.
The architect, unable to stop designing, found himself sketching floor plans during his Mediterranean cruise — a true busman's holiday that his wife found both amusing and exhausting.