Against the backdrop of the Los Angeles County Museum of Art (LACMA) retrospective “Coded: Art Enters the Computer Age, 1952-1982,” four artists gather to ‘fill’ Casey Reas’ software installation An Empty Room (2023) with intimate, evocative gestures. More happening than performance night, the program fittingly called “A Full Room” brings together Edgar Fabián Frías, Lauren Lee McCarthy (image), Romi Ron Morrison, and Reas himself who, through song, poetry, and prayer, ask a vexing question: “What is social software?”