Today on House of Machismo, guest host Gustavo Alvarez joins the madness—and the guys waste no time making him feel at home… by serenading him with a hit from their favorite boy band. (Because nothing says machismo like synchronized crooning.) But Gustavo's no slouch—he claps back with a smooth oldie but goodie of his own. Meanwhile, Albert and Marty lace up to share their latest run club escapades, including who nearly passed out and who left the other in the dust. And to wrap things up, it's time for another hilarious round of "Guess That Spanish Word".