Ratio Comedy staple The Doom Room calls upon comedians to be funny absent the safety net of their joke books and riff on a random assortment topics that pop up on the nearby screen of doom, all while being heckled by the Darth Vader-esque voice of doom (Lucha Libre & Laughs' Nick Gossert). It's a steep challenge, wherein some of the performers ride a wave of laughter from the beery crowd and others crumble by the second prompt. As a performer, the show is a nerve-wracking trial by fire, but for audiences who love a healthy dollop of schadenfreude with their jokes, there's no better show in town. Imported to Denver after originating in an Omaha dive bar, The Doom Room has cropped up in a number of different venues around town, everywhere from the Crossroads Theater to the basement under 3 Kings --remember when there were comedy shows there? This month's lineup features co-creator Ian Douglas Terry along with Nicholae Roscoe, Aaron Middleton, Josh Skillman, Gabby Gutierrez-Reed, Cory Helie and emcee Andrew Bueno. Admission is free, visit The Doom Room's Facebook events page to learn more.