Here's one (not solely experienced in startups, however):
manager: "Since you're single, can you work through the holidays and cover the systems/push this feature/go the extra mile so that the people with families can spend time with them?"
manager: "Since you're single, can you work through the holidays and cover the systems/push this feature/go the extra mile so that the people with families can spend time with them?"
Earns goodwill from the people with families, the boss has one less thing to worry about at end of year, and the holidays are usually "dead time" so I got a lot of slack time in.
(Though, thinking about it, I was told once "Yeah, well, you don't have kids, so this [the holiday] isn't that important for you." that wasn't a startup, however, that was a F100)