Well, Alex does seem rather prone to wanderings in general, midnight and otherwise (with some scotch or something in hand, no doubt), and since he still feels some responsibility for Ben and Janni, I could see him wanting to check on them. And considering how completely exhausted Janni is, she's probably sleeping like a rock, hard enough that Ben and Alex can at least have a quiet conversation in the room without waking her.

I mean, when I'm coming off 24 hours straight of travel from Anchorage to Europe, say, especially when I get in sometime in the morning and have to wait another 12 hours or something to sleep, I crash hard. Especially assuming the bed's comfortable and people aren't, like, having a party when I'm trying to sleep, once I'm out I'd probably be rather harder to wake than usual.