Is there a phraseme or idiom for "doing something useful (necessary) and pleasant at the same time" with positive connotation?
For example - using a bike to get to work and back home is useful (because it allows you to train your body), and pleasant (if you go through the park or a forest, etc.).
Or, another possible example - a boss may convince an employee to sign in for a business trip (to the North Pole) because it is useful to the firm and may be pleasant because the employee is an amateur photographer and will have a chance to take a photo of a polar bear.
There is a Russian phraseme that is usable in both cases, but is there a similar one in English for at least one of the cases?