Found in Sherrilyn Kenyon's Dark Hunter Vampire series. The daimons are another word for vampires. They are immortals that stop aging at the age of 27 where they constantly feed off of human souls to continue living. They are a race cursed by the Greek god Apollo and led by the Atlatean goddess, Apollymi who has a grudge again Apollo for killing her only son.
The daimon stalked the woman out of the bar so he could trap her in the ally and eat her soul.