We did this when I was in a band 25+ years ago. Record the song, quickly burn it to a CD, then drive back to campus in our shitty Honda Civic or band pickup truck and listen to it. It was 90% just to listen to what we made, but hearing it outside of the studio was good as well.
At this same time, this feels like No Speaker Left Behind. Now that I am middle aged and have a nice sound system at home and in my car, I sort of want a mix optimized for THAT! Like, don't hold me back just because we're still mixing for AM radio in a 1983 Pontiac Firebird!