A favorite of the local supernatural population, a place where they can kick back and relax or dance a bit. This place has long been a neutral place for all to gather, though it helps that there are spells in place to keep the peace
If you need a last component for a spell or need to pick up a few books for research on that menacing demon who is about to destroy the world this is the place to go. Zakk's carries all sorts of mystical artifacts and books at a very affordable price.
Very popular amongst the non hostile demon crowd, Capital Hill has long been a place of understanding for alternative lifesyles, which helps greatly if your a demon trying to fit in amongst a place that has lots of people giving themselves body modifications in an attempt to prove thier "Indiviuality" to everyone around them.
Given it's location and proximity to various places, this area is rife with vampires. In fact it is the Vampire stomping grounds of the Seattle area.