Janus excuses himself to the bathroom and then uses his hat of disguise to appear like a nondescript member of the tavern/inn.
Janus sidles up to Glim and whispers, Listen, I don't really need to eat or sleep. I'll need about 2 hours of sleep and 6 more of meditation, but I'm going to spend a bit of time disguised, on watch. If you need me, come back here and I'll find you.
And just as quickly as he showed up, Janus melts into the throng again.
[spoiler]Stormcrow, Janus is going to be on alert, constantly taking his time to search, spot, listen, sense motive, etc. He's looking for anything that might prove harmful to his comrades or himself. 8 and a half hours before we're all set to meet up and move out, Janus is going to start meditating to regain spells, and then after 6 hours of meditation, he'll sleep for 2 hours. Yay Ring of Sustenance.[/spoiler]