America's Rock n' Roll Bacchanal returns to Mandalay Bay Resort & Casino August 20th through August 22th, with another resort-wide casino takeover unlike anything else in the world. Now approaching its fifth year in the swirling neon decadence of Sin City, PSYCHO LAS VEGAS will feature over seventy artists across four stages including the Michelob ULTRA Arena, the iconic House Of Blues, Mandalay Bay Beach, and the vintage-Vegas vibe of Rhythm & Riffs Lounge in the center of the casino floor. PSYCHO LAS VEGAS will once again redefine America's conception of what a music festival can be.