According to Mantus, the ultra-lounge is "Dallas' only premier house music venue," and the ultra-chic club features local DJs and also brings in big-time DJs like Fedde le Grand, a internationally known Dutch house DJ. Mantus is located beneath Iron Cactus on Main Street in the heart of downtown. Entering guests descend a small spiral staircase, then pass through a small outer bar area before arriving at the sleek, swanky lounge area, bathed in cool blue lighting. Inside, in addition to the modern mood lighting, the ultra- lounge offers plenty of seating, a large bar whose front is filled with shimmering crystals and more modern mood lighting. It's a bit like being inside an exotic fish tank of the future--minus the fish, of course. Mantus is open Friday through Sunday from 10 p.m. until 2 a.m.