Thanks to all who wrote in with suggested uses for my empty living room. I'm happy to announce that a decision has been reached.
Though it does have some appeal, we will not be incorporating Reader A's idea for a kiddie roller rink atop the hardwood floors of which I am reasonably proud. Nor do we have the resources to install oversized aquarium tanks, as Reader B proposed, in order to house an exhilarating assortment of colorful fishies.
Instead, with my parents' generous donation of the piano I grew up with, the living room has embarked on its journey toward being made over into a library-slash-study. What does a library-slash-study have to do with pianos?
We just really liked the library idea, okay?
And pianos don't generally belong in libraries, but the living room has nice acoustics, so when someone is playing the piano it will be referred to as the study.
Because technically music is a subject to be studied. Or something.