AC Hotel Washington DC 601 K St NW, Washington, DC 20001, USA HALLOWEEN AT AZURE Straight from the rooftops of New York, AZURE brings its iconic house music to Washington D.C. Enjoy an enclosed rooftop with panoramic views, crafted cocktails, and an atmosphere gone dark. DJs keep the dance floor alive all night as the room transforms into a shadowy haunt above the city. Come in costume and celebrate Halloween high above D.C.