Unless there's something broken, a system down, or a critical issue that needs to be fixed yesterday, I got news for you: I ain't staying late either.
I'm 32 with a dog and a highly opinionated cat. Hire me, or don't. Plenty of other companies out there that respect work life balance and don't insist on the awful notion of "well you don't have anyone waiting on you to get home anyway, why do you care?" (of course I'm deliberately phrasing that awfully, but let's be honest with ourselves here).