Been working on this one for a few months. It's the real world, but has 'Mystics,' which are any magical beings from any and almost all mythologies. and pop culture. Most mystics stick together in underground support networks (which, in most cases, also delve into the world of organized crime).
Vampires and werewolves are the most common Mystics, as they're the most successful at hiding in plain sight. Vampires typically dominate cities and larger towns, whereas werewolves dominate the more rural areas.