I acknowledge that certain types of music are more likely to be popular among certain demographic groups, though I suspect that's due more to social conditioning than it is to innate musical taste. That said, and giving credence to social conditioning, I would think Adele's music, which focuses less on repetitive hooks and modern mixing techniques and more on traditional songwriting elements and quality musicianship, would appeal to an adult listener, regardless of gender. Overall, though, it seems fairly obvious that people in pretty much every demographic enjoy her music and this song in particular. It's part of the reason why her video was viewed 12 million times in the first 24 hours it was up. Adult males surely accounted for a lot of those views.