Just be careful.
For instance, every sixth century, a conference of the biggest, baddest humans and a group of demon agents meet up in an isolated spot for the hex-centennial Wickedness Conference. Fashion in the underworld is limited to torn rags and loincloths. For the next few days, mortals and demons eat cold sandwiches and bad coffee while discussing ways that evil can get the best of the mortals. It's so busy up here!.