CLEARWATER, FL—The Ars Nova Café has enjoyed massive success since introducing its signature closed-mic night, coffeehouse manager Peter Haney, 38, said Tuesday. "In August, I did away with the Monday Night Amateur Showcase," Haney said. "Since then, Monday has been our busiest night. Who would've thought that people prefer conversation to bad acoustic-guitar music and wretched poetry?" Having noted the success of the café's Absolutely-No-Live-Entertainment Monday, the bar next door recently announced plans to launch No-House-Band Saturday.